Which of the following processes describes how a volcano forms at oceanic-oceanic and oceanic-continental plate boundaries?
A. The less-dense crust of one plate sinks below the denser crust of the other plate. This causes friction, which causes the crust to turn into liquid magma.
B. The denser crust of one plate sinks below the less-dense crust of the other plate. This causes friction, which causes the crust to turn into liquid magma.
C. The less-dense crust of one plate pulls away from the denser crust of the other plate. This causes the liquid magma to freeze into mountainous crust.
D. The denser crust of one plate pushes against the less-dense crust of the other plate. This causes the liquid magma to harden into crust.
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in my opinion option C is correct
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