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.