-Donna Owns the Only Dog Grooming Salon on Lonely Island

-Donna owns the only dog grooming salon on Lonely Island. The figure above shows the dog grooming market. Donna is a single-price monopoly that maximizes profit by charging ________ per grooming and producing ________ groomings per day.

A) $30; 8
B) $20; $8
C) $20; $12
D) None of the above answers is correct.