The Economy's Current Rate of Interest Is 10 Percent and a Firm

The economy's current rate of interest is 10 percent and a firm has $10,000 of owner-invested capital. Its total revenue is $5,000 and the firm's explicit costs are $3,000. From this we know that this firm's

A) accounting profit is $500.
B) economic profit is $2,000.
C) accounting profit is $12,000.
D) economic profit is $1,000.