Which detail from "The City Without Us" most clearly shows that nature is more powerful than it appears?
A. The worthlessness of the money left in bank vaults that remain intact
B. The reentry of wolves onto Manhattan Island after humans have left
C. The ocean waves that threaten to break the levees around New York City
D. The Bronx squirrels that eat nearly all of the tree's acorns in the New York Botanical Garden