The Use of "Most-Favored-Customer" Clauses Is an Example of

The use of "most-favored-customer" clauses is an example of

A) incenting members to maintain the cartel, because if they lower the price for one customer, they have to lower it for previous customers as well.
B) incenting members to maintain the cartel, because if they raise the price for one customer, they have to raise it for previous customers as well.
C) giving customers special perks for purchasing goods from members of the cartel.
D) selling higher quality goods and services to favorite customers.