Multiple Choice
The average thickness of oceanic crust is about __________, whereas the average thickness of continental crust is about __________.
A) 20-10 km, 1-2 km
B) 1-2 km, 10-20 km
C) 20-40 km, 4-7 km
D) 4-7 km, 20-40 km
Correct Answer:

Verified
Correct Answer:
Verified
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