Which situation is the clearest example of cause and effect in "The City Without Us"?
O A. Some time in the next 100,000 years, glaciers will cover all of
Manhattan.
O B. If flooding were to go unchecked, steel support beams in
buildings would rust.
O C. While suspension bridges will last a few centuries, truss bridges
may last 1,000 years.
O D. Water in Manhattan's underground spaces has to be pumped out
daily.