Suppose two types of consumers buy suits. Consumers of type A will pay $100 for a coat and $50 for pants. Consumers of type B will pay $75 for a coat and $75 for pants. The firm selling suits faces no competition and has a marginal cost of zero. If the firm can identify each consumer type and can price discriminate, what is the optimal price for a pair of pants?

A. Charge both types $150.

B. Charge both types $75.

C. Charge type A consumers $50, and type B consumers $75.

D. Charge type A consumers $50, and type B consumers $50.