Consider the two models seen here. These models represent two different minerals. Each is composed of a lattice of carbon atoms. How do these crystals differ?

A) The two have different chemical formulas. Eliminate

B) The diamond model represents a crystal while the graphite represents a molecule.

C) Both are crystals, but the organized arrangement of the carbon atoms in each differs.

D) The graphite crystal is not pure: that is, it contains two elements while the diamond crystal is composed of carbon atoms only.