I need some help with a homework question.

Stahl Consulting started the year with total assets of $60,000 and total liabilities of $15,000. During the year, the business recorded $48,000 in catering revenues and $30,000 in expenses. Stahl made an additional investment of $9,000 and withdrew cash of $15,000 during the year. The net income reported by Stahl Consulting for the year was:

A)

$3,000.

B)

$12,000.

C)

$18,000.

D)

$27,000.