Brewsters, a ice cream 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 $5, her average variable cost per unit is $3, and the market price is $2.50. In the short run, Lydia should Choose one: A. expand production because she is making a positive economic profit.