The inverse demand curve for a firm with market power is P = 60 - Q, and its marginal cost is given by MC = 2Q. If the firm decides to practice first-degree price discrimination, the deadweight loss will:

a. decrease from $37.50 to $0.

b. decrease from $45 to $15.

c. increase from $0 to $65.

d. increase from $30 to $45.