Does Adding Vegetation to a Slope Make It More or Less

Multiple Choice

Does adding vegetation to a slope make it more or less stable?

A) More stable because the roots will draw water deeper into the ground instead of allowing water to saturate the surface
B) More stable because the vegetation roots will hold together loose soil
C) Less stable because the vegetation adds weight to the slope
D) Less stable because the vegetation will keep more water at the surface of the slope
E) It depends on the slope, adding vegetation could make the slope either more or less stable.