The key feature of oligopolistic competition is:

c) Interdependence of suppliers

Interdependence from other firms is the main feature since the rest of the features rotate around this one.

c) Interdependence of suppliers<<<<<<<<<>>>>>>>>

Yes, the correct answer is CCCCCCCCCCCCCCCC

I agree with Mr. Jetley

c) >>>>>>>>Interdependence of suppliers

If they are selling identical products then they are dependent on the suppliers i.e. the option 'C' but if their products are different then option 'B' is better.

I think it's ----------C

Thanks

Correct answer option C) <<<<<<<<<<<<<<<<<<<<<<<<<<<

I go with Mr. Vinod Jetley's answer C ...

The correct answer is 

c) Interdependence of suppliers

The three most important characteristics of oligopoly are:

(1) an industry dominated by a small number of large firms,

(2) firms sell either identical or differentiated products,

(3) the industry has significant barriers to entry.