Answer:
The answer to this question is Option C.
marginal revenue will be greater than marginal cost.
Step-by-step explanation:
Monopolistic competition characterizes an industry in which many firms offer products or services that are similar, but not perfect substitutes.
There is low barrier to entry and exit in a monopolistic competitive industry and the decisions of any one firm do not directly affect those of its competitors.In a monopolistic competition, there is a negative relationship between price and quantity demanded.
If Susan increases her price to $15, marginal revenue will be greater than marginal cost.
Hence the answer is Option C