If Clients of a Brokerage House Feel That There Are

If clients of a brokerage house feel that there are anticompetitive activities being used among and between the various brokerage houses that result in price impacts for them,then:

A) their remedy is under the Sherman Act for price fixing or monopolization.
B) their remedy is under the Clayton Act for vertical price discrimination.
C) their remedy is under the federal securities laws and regulations.
D) none of the above