That her hometown was a bleak place, and doesnt know why she would think back on it
I think the answer is B. People concerned about the environment are likely to buy eco-cars. This may or may not be the correct answer. I think I got this wrong. Sorry if the answer isn't correct.
I would probably say that the author used diction to achieve some kind of effect in the first sentence.
A. The teacher stood at the door smiling brightly and welcoming each student to her classroom on the first day of school.
The author's diction, or word choice, in this sentence portrays the teacher as a nice, kind, caring person.
