In frost wedging, a crack expands when water _______. When the water _______ it can seep into new fissures in the rock.
A. Freezes, melts
B. Melts, freezes
C. Melts, melts
D. Freezes, freezes
A. Freezes, melts
B. Melts, freezes
C. Melts, melts
D. Freezes, freezes