Chemical weathering
a. is caused by freezing and thawing
b. breaks apart rocks by physical processes
c. occurs when chemical reactions dissolve or change the minerals in rocks
d. none of above

(C) Occurs when chemical reactions dissolve or change the minerals in rocks.

Explanation:

 The chemical weathering is the process of weakening and disintegration of the rock by some chemical reaction. The chemical weathering occur when the chemical reaction are dissolve and also get change the minerals in the rocks.

The chemical reaction include oxidation and the hydrolysis. This process either destroy the minerals or form the minerals. It basically manage the composition of the rock minerals.

Therefore, Option (C) is correct.

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