Which statement is correct regarding metamorphic rock formation?

Multiple choice question.
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A)
The temperature inside Earth is cooler which allows metamorphic rocks to form more quickly.

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B)
Small pieces of rocks are buried, squeezed, and cemented together.

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C)
Weathering and erosion cause rocks to break down to form metamorphic rocks.

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D)
The deeper into Earth’s crust, the higher the pressure that forms metamorphic rocks.