80.Why does the author say “….one mild season in 2006 has plunged Americans in hurricane-vulnerable states into a dangerous amnesia”？
(A) Americans have forgotten about the damages hurricanes can cause.
(B) There were not many storms in 2006 and people think that it is a sign of danger.
(C) When facing hurricanes, Americans are very brave and have no fears.
(D) Many states in America are very vulnerable and need to be rescued from danger.