Question

read it!
many cities have been using new bulbs in traffic lights. these new bulbs are saving money. the new bulbs last longer and they use less power. the old bulbs used a lot of power. they also needed to be changed every year. the new bulbs last up to seven years. they do not need to be replaced as often.
do it!
over time, the new bulbs are ______.
a brighter
b safer
c warmer
d cheaper

Explanation:

The passage talks about new bulbs in traffic lights lasting longer, using less power, and not needing frequent replacement. The question is about how the new bulbs are over time. Option B (safer) isn't supported, C (warmer) and D (cheaper) aren't mentioned. The text says new bulbs last up to seven years and old ones needed yearly replacement, but also that new bulbs use less power and save money. Wait, no—wait, the options: A is brighter? Wait, no, let's re - read. Wait, the passage: "These new bulbs are saving money. The new bulbs last longer and they use less power. The old bulbs used a lot of power. They also needed to be changed every year. The new bulbs last up to seven years. They do not need to be replaced as often." Wait, the question is "Over time, the new bulbs are ____." Wait, maybe I misread. Wait, the options: A. brighter, B. safer, C. warmer, D. cheaper? Wait, no, maybe the key is about their cost - effectiveness? Wait, no, the passage says they save money because they last longer and use less power. But the options: Wait, maybe the correct answer is related to their longevity and power usage, but the options given: Wait, maybe I made a mistake. Wait, let's check again. The passage: "Many cities have been using new bulbs in traffic lights. These new bulbs are saving money. The new bulbs last longer and they use less power. The old bulbs used a lot of power. They also needed to be changed every year. The new bulbs last up to seven years. They do not need to be replaced as often." Wait, the question is "Over time, the new bulbs are ____." Wait, the options: A. brighter, B. safer, C. warmer, D. cheaper? Wait, maybe the intended answer is D? No, wait, maybe the passage implies that because they last longer and use less power, over time they are cheaper (since you spend less on replacement and power). But let's check the options again. Wait, maybe I misread the options. Wait, the user's image: options are A. brighter, B. safer, C. warmer, D. cheaper. The passage says new bulbs save money (last longer, use less power, so over time, they are cheaper because you spend less on them). So the correct answer is D. cheaper? Wait, no, wait, the passage says "saving money" because they last longer and use less power. So over time, they are cheaper (D). But let's confirm. The old bulbs needed to be changed every year, new last seven years. Old used a lot of power, new less. So over time, new bulbs are cheaper (D).

Answer:

D. cheaper