If this firm were a perfect competitor selling its entire output at a price of $10,the marginal revenue product of the fourth unit of output would be

A) $0.
B) $10.
C) $15.
D) $20.
E) $150.

Marginal Revenue Product

The additional revenue produced by adding one more unit of a specific input (like labor), assuming other inputs remain constant.

Perfect Competitor

A hypothetical market scenario where numerous small firms compete against each other, and none of them can influence the market price.

Output

The total amount of goods or services produced by a business, industry, or economy in a given period.