Question

1. which of the following is/are true?

○ a. we should not drive if we have any alcohol in our system, even small amounts.
○ b. most crashes occur when drivers are completely sober.
○ c. even small amounts of alcohol decrease driver judgment and skill, and this increases the likelihood of crashing.
○ d. all of the above

1. alcohol and speeding are major factors in fatal crashes. which of the following statements regarding speeding is/are true?

○ a. speeding from place to place saves much time unless a law enforcement officer stops you
○ b. approximately 30% of fatal crashes involve speeding
○ c. increasing your speed from 50 to 60 miles per hour will cut your travel time in half
○ d. all of the above

Explanation:

Question 8

• Option a: While some jurisdictions allow low BAC, even small alcohol affects driving, but "any" is extreme, but let's check others.
• Option b: Most crashes are not when sober (alcohol, distraction are big factors), so b is false.
• Option c: Even small alcohol impairs judgment/skill, increasing crash risk – this is true.
• Option a: The idea that any alcohol (even tiny) means no driving is a safety - focused view, and c is true. But let's re - evaluate:
• a: In strict safety terms, even small alcohol can impair, so some safety guidelines say no driving with any.
• c: Scientifically, even small BAC (like 0.02) can affect reaction, judgment.
• b: False, most crashes aren't with sober drivers (alcohol, speeding, distraction are factors). So a and c are true? Wait, no – the options:
• a: "We should not drive if we have any alcohol..." – from a safety perspective, this is a recommended practice (even small amounts can impair).
• c: "Even small amounts... decrease driver judgment... increase likelihood of crashing" – this is a fact (alcohol is a depressant, affects cognitive and motor skills).
• b: "Most crashes occur when drivers are completely sober" – false, as alcohol - related crashes are a significant portion, and other factors like speeding, distraction also, but sober drivers don't cause most crashes. So a and c are true? But the options are a, b, c, d. Wait, maybe the intended answer is c (and a is a bit extreme, but c is a factual statement about the effect of small alcohol). Wait, let's think again:
• a: Is it true? Legally, in many places, you can drive with a small BAC (like 0.02 - 0.05), but from a safety perspective, even small amounts can impair. But the question is which is/are true.
• c: Is a fact – alcohol, even small, impairs driving ability, increasing crash risk.
• b: False, so b is out.
• So between a and c. But maybe the answer is c (since a is a prescriptive "should" and c is descriptive about the effect). Or maybe a and c? Wait, the options:
• a: "We should not drive if we have any alcohol... even small amounts." – this is a safety recommendation (correct from a safety - first view).
• c: "Even small amounts... decrease driver judgment... increase likelihood of crashing." – this is a scientific fact.
• So both a and c? But the options don't have "a and c". Wait, the options are a, b, c, d (all of the above). But b is false, so d is out. Wait, maybe I made a mistake. Let's check again:
• b: "Most crashes occur when drivers are completely sober." – Statistics show that a significant number of crashes involve alcohol, speeding, distraction. So most crashes are not when sober. So b is false.
• So a and c: a is a safety guideline (true in terms of best practice), c is a fact (true). But the options: if we have to choose from a, b, c, d. Wait, maybe the intended answer is c (and a is a bit of a stretch, but c is definitely true). Or maybe a is considered true (as a safety rule) and c is true, so is there an option? Wait, the options are a, b, c, d. Since b is false, d is out. So between a and c. But maybe the answer is c (and a is a prescriptive statement, but c is descriptive and true). Alternatively, maybe a is considered true (as in, for safety, any alcohol is too much) and c is true, so if we have to pick, c is a definite fact.

• Option a: Speeding does not save much time (e.g., driving 5 miles at 30 mph takes 10 minutes, at 60 mph takes 5 minutes – only 5 minutes saved for 5 miles). Also, the risk of crash increases, so a is false.
• Option b: Approximately 30% of fatal crashes involve speeding – this is a fact (according to traffic safety statistics).
• Option c: Increasing speed from 50 to 60 mph: Time = Distance/Speed. If distance is D, time at 50 is $t_1=\frac{D}{50}$, at 60 is $t_2=\frac{D}{60}$. The ratio $\frac{t_2}{t_1}=\frac{50}{60}=\frac{5}{6}$, so time is reduced by $\frac{1}{6}$, not half. So c is false.
• So only b is true.

Answer:

c. Even small amounts of alcohol decrease driver judgment and skill, and this increases the likelihood of crashing. (and also a could be considered, but since b is false, d is out. So the correct options are a and c? But the options given are single - select? Wait, the question is "Which of the following is/are true?" – so it can be multiple. But the options are a, b, c, d. Let's re - check:

• a: True (from a safety - first perspective, any alcohol can impair, so we should not drive).
• b: False.
• c: True (scientific fact).
• So a and c are true. But the options don't have "a and c" as a separate option. Wait, maybe the question is from a driver's education perspective where a is a recommended rule and c is a fact, so the answer is d? No, because b is false. Wait, I must have made a mistake. Let's check the crash statistics: Most crashes are not when drivers are sober. So b is false. So d is out. So the true ones are a and c. But the options are a, b, c, d. So maybe the intended answer is c (and a is a bit extreme, but c is a clear fact). So I'll go with c.

Question 9