-When the Monopolistically Competitive Firm Shown in the Above Figure

-When the monopolistically competitive firm shown in the above figure is at its long-run equilibrium, it will be

A) producing the efficient scale of output and is at point A on the ATC curve.
B) producing more than the efficient scale of output and is at point C on the ATC curve.
C) producing at less than the efficient scale of output and is at a point such as F on the ATC curve.
D) producing the efficient scale of output and is at point B on the MC curve.