Which statement about metamorphic and sedimentary rocks is true?

A Both types of rocks form under high temperature, but sedimentary rocks also require high heat.
B Only metamorphic rocks show signs of rock layers.
C Both types of rocks form under high pressure, but metamorphic rocks also require high heat.
D Both types of rocks result from the cooling of magma.
E Either type of rock can be classified as intrusive or extrusive.