If an Oligopolist's Demand Curve Has a "Kink" in It

Multiple Choice

If an oligopolist's demand curve has a "kink" in it, then over some interval,

A) the oligopolist's marginal cost curve will have a break in it.
B) the oligopolist need not fear entry into the industry by new firms.
C) the oligopolist's competitors will not react to its price changes, either up or down.
D) changes in marginal cost will not cause a change in the profit-maximizing price.