Question

these lights are too cool!
physical science studies: wave interactions
cities around the country
have been using some
new traffic lights. these
lights last longer and use
less energy. so cities save
money. but the bulbs
dont burn hot enough to
melt snow. this can
cause problems for
drivers.
the traffic lights use led
bulbs. these bulbs use
much less energy than
those used in most traffic lights. thats good for the
environment. its also good for cities. since the bulbs use
less energy, they last for seven or more years. other bulbs
need to be changed every 12 to 18 months.
what else is good about led traffic lights? they dont
waste energy by making heat. this is also a problem,
however. why? the lights dont melt snow. wet snow can
the news story says:
one solution is to have workers clean the
snow off the lights. this is lot of work,
however. some cities are trying to find ways
to block the snow. others hope to heat the
traffic lights so the snow will melt.
the author uses these sentences mostly to help
the reader know________.
a. some ways cities can fix the problem with
led traffic lights
b. why cities want to try to keep the new led
traffic lights
c. why cities do not want snow to block led
traffic lights
d. some ways cities block snow from led
traffic lights

Explanation:

The first sentence in the green - boxed text says "One solution is...", and then mentions other solutions like blocking snow and heating the lights. This shows different ways cities can solve the problem of snow on LED traffic lights. Option A is correct as it refers to ways to fix the problem. Option B is about why cities keep the lights (which is mentioned earlier, not in the green - boxed text). Option C is about the reason for not wanting snow (not the main focus of the green - boxed text). Option D is incorrect because "blocking snow" is only one of the solutions mentioned, not the overall purpose of the sentences.

Answer:

A. Some ways cities can fix the problem with LED traffic lights