if a court employs the rule of reason when considering whether a firm is guilty of violating antitrust laws, the court a. considers the consequences of the offending practice that the firm engaged in. b. considers only whether the firm has market power, not whether it used that power unreasonably. c. ignores the economic rationale for the offending practice and its consequences. d. does not consider why the offending practice was adopted or its effect on competition. e. need only determine that the offending practice took place.