An Oligopoly Market with Differentiated Products Is Similar to a ________,But

An oligopoly market with differentiated products is similar to a ________,but the key difference is ________.

A) monopolistic competition market; oligopoly markets are more efficient
B) perfect competition market; oligopoly markets are more efficient
C) monopoly; the oligopolist must recognize the behavior of its competitors
D) monopolistic competition; there is no free entry in oligopoly