The Following Figure Shows the Cost Curves of Firm That

Multiple Choice

The following figure shows the cost curves of firm that operates in a monopolistic competition market, as well as the demand (D) facing this firm and its marginal revenue (MR) .

-Refer to the figure above.In the long run,________.

A) the D and MR curves shift right, but MC and ATC curves will remain the same
B) the D curve shifts right, but MR, MC and ATC curves will remain the same
C) the D and MR curves shift right, but MC and ATC curves shift up
D) the MC and ATC curves shift down, but D and MR remain the same