According to the Parker V. Brown Doctrine

According to the Parker v. Brown doctrine:

A) the usual and legitimate union activity that is exempt from the Sherman Act.
B) concerted efforts to lobby government officials are not anticompetitive.
C) the Sherman Act does not apply to state government.
D) not all independent action by a manufacturer is a per se violation of the Sherman Act.
E) only unreasonable attempts to monopolize were covered by the Sherman Act.