Question

question # 11
multiple choice
the combined use of marijuana and alcohol _____.

lowers the bac of the driver causing some impairment of driving ability
does not affect driving ability
may affect driving ability if both substances are taken in abundance
impairs driving beyond that usually related to the bac of alcohol

Explanation:

To determine the correct answer, we analyze the effects of combining marijuana and alcohol on driving:

• The first option is incorrect because marijuana doesn't lower BAC (Blood Alcohol Concentration), and both substances impair driving.
• The second option is wrong as both substances are known to affect driving ability.
• The third option is inaccurate because even in non - abundant amounts, the combination can affect driving, and the main point is about the combined impairment being more than just alcohol's BAC - related impairment.
• The fourth option is correct. Marijuana and alcohol have synergistic effects on the central nervous system. When used together, they impair driving beyond what would be expected from the BAC of alcohol alone. This is because marijuana affects coordination, reaction time, and judgment, and when combined with alcohol (which also impairs these functions), the overall impairment is greater.

Answer:

D. impairs driving beyond that usually related to the BAC of alcohol