Southern Asia Is Marked by a Wildly Wet Monsoon Season

Southern Asia is marked by a wildly wet monsoon season in the winter followed by a starkly dry summer. How might the water from the monsoon season be best captured for use in the summer?

A) Water should be caught using large tarps, the the water funneled into storage barrels.
B) A large dam with accompanying hydroelectric plant should be constructed.
C) Channels should be dug to guide monsoon rainwater to underground wells.
D) Each household should be responsible for catching and preserving its own water in preparation for the hot dry summer.