Which of the Below Would Do Most to Affect the Components

Multiple Choice

Which of the below would do most to affect the components of the hydrologic cycle to the greatest extent for the Earth as a whole?

A) the onset of an ice age
B) a wet year for central Asia
C) a drought in the American Midwest
D) the damming of the Amazon River
E) the "mining" of water in the Ogallala aquifer