Which Explains Why Exfoliation Occurs

Which explains why exfoliation occurs?

A) Water combines with minerals and increases their size,thereby causing surrounding minerals to expand.
B) Water freezes in joints and expands.
C) Overlying rock is removed,thereby allowing the underlying rock mass to expand and fracture.
D) Evaporated water leaves behind previously dissolved mineral to form crystals,which accumulate and grow over time,exerting pressure on the rock.