Get it right and i will try to make you brillance
Most rocks are

A.

compounds made of minerals.

B.

mixtures of minerals.

C.

mixtures of cells.

D.

compounds made of cells.

B. - Mixtures of minerals.

Exclamation: It couldn't be D or C because rocks are not living things, therefore they aren't made of cells. It couldn't be A because rocks are made out of mixtures of minerals, so a variety, not compounds.