Mass movement of weathered materials may be gradual or sudden depending on the?

I. gradient of the slope and gravitational force

II. weight of the weathered debris

III, supply of lubricating moisture by rainwater coupled with gravitation force

IV type of weathering which has taken place

A. l, ll and lll
B. l, ll and lV
C. l and lv only
D. ll and lV only
E. lll and lV only

Correct Answer:

Option A – l, ll and lll