-Figure 8-11 Indicates the Prices at Which Lorine's Hair Salon

-Figure 8-11 indicates the prices at which Lorine's Hair Salon is able to sell various quantities of manicures.If the marginal cost of a manicure is constant at $12.50,then the hair salon's profit on manicures is maximized at

A) 2 manicures per day
B) 3 manicures per day
C) 4 manicures per day
D) 5 manicures per day
E) 6 manicures per day