I need help with 9 and 10!

9.) which of the following statements best describes slump?

A: slippage of a block of material moving along a curved surface
B: blocks of rock sliding down a slope
C: rapid flow of water-saturated debris, most common in mountains areas
D: slow downhill movement of soil and regolith

10.) Alternate freezing and thawing often leads to ____?

A: creep
B: slumps
C: mudflow
D: earthflow

PLZ HELP ME!!!!