Claudia worked as an accountant, earning $30,000 annually. Then she inherited a piece of commercial real estate that had been renting for $12,000 annually. Claudia decided to leave her job and operate a Mexican restaurant in that space. At the end of the first year, her total revenues of $260,000 and total costs of $230,000 for food, utilities, cooks, and other supplies. Her economic profit at the end of one year is

A. $230,000. 

B. $30,000. 

C. $20,000. 

D. –$12,000.