Use the Following to Answer Questions

Use the following to answer questions :
Scenario: Betty's Cookie Shop
Betty runs a cookie shop where she sells cookies for $1 each.She employs five people,each of whom worked a total of 500 hours last year;she paid them $10 per hour.Her costs of equipment and raw materials add up to $75 000.Her business ability is legendary,and other companies have offered to pay Betty $100 000 to come to work for them.She also knows she could sell her cookie shop for $150 000.The bank in town pays an annual interest rate of 3% on all funds deposited with it.
-(Scenario: Betty's Cookie Shop) Use Scenario: Betty's Cookie Shop.Betty is trying to decide at what point she should stop selling cookies,and she knows that she cannot change the price of a cookie.She should stop selling cookies if her:

A) economic profit is positive.
B) explicit and implicit costs are less than her revenues.
C) implicit costs are greater than her accounting profits.
D) economic profit is equal to her accounting profit.