A. Monopolistically competitive firms sell a homogeneous product while monopolies and oligopolies sell a differentiated product.
B. Monopolistically competitive firms are price takers while monopolies and oligopolies are not.
C. Monopolistically competitive firms are not constrained by market demand while monopolies and oligopolies are.
D. Monopolistically competitive firms cannot influence market price by virtue of their size alone while monopolies and oligopolies can.
ANSWER
D