Would Adding Mass to the Top of a Slope in the Form

Multiple Choice

Would adding mass to the top of a slope in the form of houses or buildings make the mass more or less likely to slide?

A) It would make it less likely to slide because the houses would add pressure on the slope keeping it stable.
B) It would make it less likely to slide because the houses make the slope less steep.
C) It would make it more likely to slide because the houses add weight to the slope making it more unstable.
D) It would make it more likely to slide because the houses would make the slope more steep.
E) Adding mass to the top of a slope would not make a difference in the stability of the slope.