Multiple Choice
Which explanation best describes how oceanic crust is formed?
A) Continental crust is swallowed by the sea at subduction zones.
B) Oceanic crust is extracted from the mantle by partial melting and crystallization.
C) Oceanic crust crystallizes in the core and is pushed up through volcanic pipes.
D) Oceanic crust formed when magma ocean cooled and has remained unchanged except around plate boundaries and at hot spots.
Correct Answer:

Verified
Correct Answer:
Verified
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