Most rocks are mixtures of different kinds of minerals. The pictures below show two different rocks viewed under a microscope in special light. The crystals you see are minerals. Compare the minerals in both pictures, then answer the question that follows.

Which of the following is true about these rocks?
A.
The minerals in both rock X and rock Y have different shapes and sizes.
B.
The minerals in rock X have different shapes and sizes, but the minerals in rock Y are all the same.
C.
The minerals in rock Y have different shapes and sizes, but the minerals in rock X are all the same.
D.
The minerals in both rock X and rock Y have different sizes but the same shape.