Context: This is a piece of peridotite. Peridotite is made mostly of the mineral olivine. Olivine gives the rock its greenish color.
Peridotite forms through the cooling of melted rock. It is usually found deep below the earth's surface. Scientists think that a large part of the earth's mantle is made of peridotite.
What type of rock is peridotite?
A. sedimentary
B. metamorphic
C. igneous
From the given choices, select the correct answer and reply with the letter of the chosen option.

C