Monopolistic and Perfect Competition Are Alike in That

Monopolistic and perfect competition are alike in that:

A) a firm's long-run equilibrium output is located where long-run average total cost is increasing.
B) a firm's long-run equilibrium output is located where long-run average total cost is minimized.
C) firms earn a normal rate of return in the long run.
D) firms are price takers.
E) firms face a downward-sloping, linear demand curve.