Marginal revenue is: a) the added revenue that a firm takes in when it increases output by one additional unit. b) the difference between total…

Marginal revenue is:

a) the added revenue that a firm takes in when it increases output by one additional unit.

b) the difference between total revenue and total costs.

c) the ratio of total revenue to quantity.

d) the additional profit the firm earns when it sells an additional unit of output.