问题详情

According to this passage, why is the United States in bad shape？
A.Because hurricanes take place there from time to time.
B.Nuclear power plants there are vulnerable to extreme weather events.
C.More than half of the U.S. population lives along the Gulf Coast.
D.The sea level rise is likely to hit the U.S. very hard.请帮忙给出正确答案和分析，谢谢！