Use the Following to Answer Question(s)

Multiple Choice

Use the following to answer question(s) :
Exhibit: Perfectly Competitive Firm

-(Exhibit: Perfectly Competitive Firm) The exhibit shows a perfectly competitive firm that faces demand curve d, has the cost curves shown, and maximizes profit. The firm is experiencing:

A) diminishing marginal returns to its variable input.
B) increasing marginal returns to its variable input.
C) negative economic profit.
D) zero economic profit.