Answer:
B:Free public transportation would encourage more people to ride buses and trains,which cause less pollution than cars do.
Answers for questions 36 through 39.
36-D. It allowed him to add less-common shapes into his design.
37-A. They explain a way of thinking that allowed an obstacle to be overcome.
38-C. Project succeeded in part because of luck.
39-D. The wide spread amazement felt about it.
Answer: The author uses specific adjectives to tell the readers about a character.
A person who is your kin is someone who is related to by blood, such as your brother or sister.
The word kinsmen is basically a synonym for B. family.