Which of the following can be inferred from paragraph 4 about the third zone？A．It is the m

Which of the following can be inferred from paragraph 4 about the third zone？

A．It is the most expensive area in which to live.

B．It does not have factories and businesses.

C．People who live there travel long distances to work.

D．Most of the residents there work and live in the same zone.

请帮忙给出正确答案和分析，谢谢！