OPEC Can Be Considered as a "Cartel" Which Is a Group

OPEC can be considered as a "cartel" which is a group of separate companies that collectively:

A) sets prices, controls output, or takes other actions to maximize profits.
B) dictates how other countries should use their products.
C) produces more products in order to beat the competition.
D) conducts activities that are considered illegal in the United States.
E) works on forming a union against management of other companies.