Multiple Choice
Spreading rates along mid-ocean ridges have ________.
A) been remarkably constant through time
B) changed through time,but are the same everywhere on Earth today
C) changed through time,and today vary between 1 and 10 m/yr
D) changed through time,and today vary between 1 and 10 cm/yr
Correct Answer:

Verified
Correct Answer:
Verified
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