What factor allows the force of gravity to overcome the resistance of earth material to landslide?

Saturation by water.
Steepening of slopes by erosion or construction.
BOTH of the above; saturation by water and steepening of slopes by erosion or construction.

Landslides are often associated with:

Periods of heavy rainfall or rapid snow melt.
Areas covered by forests and thick vegetation.
BOTH of the above; periods of heavy rainfall or rapid snow melt and areas covered by forests and thick vegetation.

Landslides are a serious hazard to which states in the United States?

States located along either the Atlantic or the Pacific coast.
Very few states.
Almost every state.

What should you do if you are caught in a landslide?

Lay on the ground as flat as possible.
Quickly move out of the path of the landslide or debris flow.
Stand in the same place and do not move.

What should you do after a landslide?

Inspect the damage caused by the landslide.
Stay away from the slide area.
NEITHER of the above.