Charlene sells cotton candy. The cotton candy industry is competitive. Charlene hires a business consultant to analyze her company's financial records. Which one of the following option for Charlene to increase her production?

Select one:

a. Total revenues exceed her total accounting costs.

b. Marginal revenue exceeds her total cost.

c. Marginal cost exceeds her marginal revenue.

d. Marginal revenue exceeds her marginal cost.