What happens to form a mid-ocean ridge?
A. At a divergent boundary between two oceanic plates, magma rises
to form a long chain of volcanoes.
B. At a convergent boundary between an oceanic plate and a
continental plate, magma rises to form a long chain of volcanoes.
C. At a divergent boundary between two continental plates, magma
sinks to form a long valley with mountains on either side.
D. At a transform boundary between two oceanic plates, magma
sinks to form a long valley with mountains on either side.
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