One Way in Which Water CANNOT Be Removed from a Wet

One way in which water CANNOT be removed from a wet slope that may slide is to:

A) plant trees and shrubs to increase evapotranspiration.
B) insert perforated pipes into the slope to help drain it.
C) dig a trench across a slope and fill it with loose, coarse rock to permit drainage.
D) pump water out from a well.
E) place a load on the slope to squeeze water out of it.