Every Agreement Concerned with Trade, and Every Regulation of Trade

Every agreement concerned with trade, and every regulation of trade, restrains. The test of legality under the antitrust laws, according to the rule of reason, is whether the restraint

A) is blatantly, inherently anticompetitive.
B) has a substantial effect on interstate commerce.
C) merely regulates and thereby promotes competition.
D) suppresses or destroys competition.