The key characteristic of an oligopolistic market is:

a) mutual interdependence among firms in the market.

b) the absence of market power by any one firm.

c) ease of entry into, and exit out of, the market.

d) production of a homogeneous product.

The key characteristic of an oligopolistic market is (a) mutual interdependence among firms in the market. An oligopoly is a market structure where there are only a few markets who are either producing an identical or differentiated product. This type of market is created because there are some barriers to entry that are preventing new firms from entering the market. Because there are only a few firms, the outcomes of each firm depends on the actions taken by the other firms.