In a Collusive Oligopoly, Joint Profits Are Maximized When a Price

In a collusive oligopoly, joint profits are maximized when a price leader establishes price based on:

A) its own demand and cost schedules.
B) the market demand for the product and the marginal costs of the various firms.
C) the market demand for the product and its own marginal cost schedule.
D) the demand curve faced by a typical competitor and its own marginal cost curve.
E) its own demand and the marginal costs of the various firms.