Faults are a kind of fracture in rock. What makes a fault different from other kinds of fractures in rock?
A. Earthquakes and mountain formation are never associated with faults.
OB. Rocks on either side of a fault move along the surface of the fault.
C.
A fault forms when pressure is applied to rock.
D.
Faults come in many different sizes.

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Explanation:

A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. ... During an earthquake, the rock on one side of the fault suddenly slips with respect to the other. The fault surface can be horizontal or vertical or some arbitrary angle in between.

associative property of addition