How Do Mass Wasting Processes Differ from Erosional Ones

How do mass wasting processes differ from erosional ones?

A) Mass wasting is always very fast and catastrophic whereas erosion is always slow and gradual.
B) Mass wasting does not require a transport agent such as wind, water, or glacial ice.
C) Mass wasting is a spring and summer phenomenon while erosion is year around.
D) Erosion usually requires steep slopes whereas mass wasting can happen even on flat terrains.