Humans Can Cause Landslides to Occur by ______________________

Humans can cause landslides to occur by ______________________.

A) adding fill dirt high on hill slopes to improve the view,thus adding to the driving mass.
B) removing material from the base of a slope to widen or clear a road or to form a building lot,thus weakening the resisting mass.
C) Both of these are correct.
D) Neither of these are correct.