Why do rocks weather faster in wet climates than in dry climates?

A.Rain provides the water necessary to cause chemical and physical changes in rocks.
B.Rain warms the temperature up, allowing ice to thaw.
C.Rain cools the temperature down in an area, providing ice to split rocks.
D.Rain reacts with oxygen to create rust in rocks, making them crumbly.

D.Rain reacts with oxygen to create rust in rocks, making them crumbly.