In American Needle Inc

In American Needle Inc.v.National Football League,the NFL had entered into an agreement with Reebok to manufacture all of its teams' official goods and claimed that all 32 teams were a single-entity.American Needle sued claiming that the Reebok agreement was an illegal conspiracy under the Sherman Act.The U.S.Supreme Court found that:

A) the 32 teams were a collective unit and not subject to the Sherman Act.
B) the 32 teams were not a collective unit and were subject to the Sherman Act.
C) the 32 teams were not a collective unit but were exempt from the Sherman Act because of the economic environment of sports.
D) there was no Sherman Act violation