A Price-Taking Firm Will Tend to Expand Its Output as Long

A price-taking firm will tend to expand its output as long as price exceeds average variable cost and:

A) its marginal revenue is positive.
B) its marginal revenue is greater than the market price.
C) its marginal revenue is less than the market price.
D) its marginal cost is less than the market price.
E) its average revenue is less than the market price.