Converse, a college apparel company, has been fairly successful in its market. Lydia sees an opportunity for profit and enters the market. After producing her profit-maximizing level of output, she finds that her average total cost per unit is $40, her average variable cost per unit is $30, and the market price is $35. In the short run, Lydia should


A.shut down her denim-colored college sportswear businessand go back to college
B.stay in business even though she is suffering a loss
C.expand production since she is making a positive economic profit
D.More information is needed to answer this question.