Jane's Garage Cleaning Is a Perfectly Competitive Firm That Currently

Jane's Garage Cleaning is a perfectly competitive firm that currently cleans 40 garages a week. Jane's marginal cost is less than the price she charges. Jane can increase her profit if she

A) charges a higher price.
B) charges a lower price.
C) cleans fewer than 40 garages a week.
D) cleans more than 40 garages a week.