Which of the following is true of the different types of crystals? A. The different types of crystals differ in angles between the faces and differ in the number of edges of equal length on each face. B. The different types of crystals differ in angles between the faces, but do not differ in the number of edges of equal length on each face. C. The different types of crystals have the same angles between the faces and the same number of edges of equal length on each face. D. The different types of crystals have the same angles between the faces but differ in the number of edges of equal length on each face.