Net entrants to the labor force is likely to be highest when the economy ________

Dave recently began running his father's farm. Last year he took in $15,000 in sales revenue and paid $10,200 in out-of-pocket costs. He made an economic profit last year:

a. if his implicit costs were $3000. b. if his implicit costs were $4000. c. if his implicit costs were $5000. d. In both cases a. and b.

Which of the following is correct?

A. Current account surplus + capital account surplus = 1 B. Current account surplus ? capital account surplus = 0 C. Current account surplus + capital account surplus = 0 D. Current account surplus ? capital account surplus = 1