Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions:
-(Table: Total Cost and Output) Look at the table Total Cost and Output, which describes Sergei's total costs for his perfectly competitive all-natural ice cream firm. If the market price of a tub of ice cream is $20, how much is Sergei's profit at the optimal short-run output?

A) $100
B) $0
C) -$5
D) -$10