You are a competitive firm in the t-shirt business. When you make the 100th t-shirt your marginal revenue is $9 and the marginal cost is $7. Since you took Econ 2113 you know that
Group of answer choices
A.producing the 100th t-shirt increases your profit by $2.
B.producing the 100th t-shirt increases the average total cost by $7.
C.your profit-maximizing level of t-shirts is less than 100 units.
D.producing the 99th t-shirt must increase your profit by less than $2.