In markets characterized by oligopoly, ​a.​the oligopolists are best off cooperating and behaving like a monopolist.
​b.​collusive agreements will always prevail.
​c.​collective profits are always lower with cartel arrangements than they are without cartel arrangements.
​d.​pursuit of self-interest by profit-maximizing firms always maximizes collective profits in the market.

Telecom co. enters into a two-year contract with a customer to provide wireless service (voice and data) for $40 per month. to induce customers, telecom co. provides a free phone. telecom co. normally sells the phone on a stand-alone basis for $200. telecom co. also charges the customer a one-time activation fee of $35.which of the following is true? a) there are two distinct performance obligations: the voice service and the data service b) the free phone constitutes as a marketing expense c) the activation fee is a separate performance obligationd) there are two distinct performance obligations: the wireless services and the phone