Consider a market with the market demand D: P = 80 - Q, which is served by four Cournot oligopolistic producers (firms) with the constant marginal...

Consider a market with the market demand D: P = 80 - Q, which is served by fourCournot oligopolistic producers (firms) with the constant marginal cost MC = $30 and no fixed cost.

35. When these four firms collude to form a cartel, the market price is

A.    45

B.    55

C.   60

D.   70