Its between a and e, need a wise opinion.

Why are radio observatories located in valleys far away from urban centers? a. to shield them from electromagnetic interference b. to avoid sound pollution c. to avoid disturbing people living in the city d. to shield them from water vapor

Most small cars a. more power than larger cars b. the same power as larger cars c. less power than larger cars

When finn studies, he likes to consult multiple types of resources, such as books, journals, and online information. he usually studies in his bedroom, but he's found that he doesn't concentrate as well there. he decides to change locations, but doesn't know where to go. which would be the best place for finn to study, based on his preferences? a. the school library and media center b. a computer lab c. a café with wi-fi d. the school archives center