If an additional worker costs you $15 per hour and can add 10 units per hour of output to the firm, you should hire that person as long as

A. demand for your product is increasing and you sell in a competitive market.
B. the product price is at least $1.50.
C. the value of marginal product is between $10 and $14.
D. the marginal product of the worker is greater than the value of the marginal product.


Answer: B

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