Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
-(Figure: A Perfectly Competitive Firm in the Short Run) Use Figure: A Perfectly Competitive Firm in the Short Run.The firm's short-run supply curve is the:

A) entire MC curve.
B) rising part of the MC curve beginning at point W.
C) rising part of the MC curve beginning at the point at which the firm starts earning economic profit.
D) MC curve below point P.