The correct option is D.
Marginal cost refers to the amount of money it cost a company to produce one more of a particular product while the marginal benefit refers to the benefit that is obtained as a result of producing that one extra product. Profit is maximized when the marginal cost equals the marginal benefits.
Answer:
c for the first one
A for the 2nd one
c i think for the last one
Explanation:
Rosetta Stone is used to teach languages
