The Federal Securities Act and the Securities Exchange Commission aimed to a prohibit completely the sale of stocks on margin (i. e. with borrowed funds). b prevent interlocking directorates and business pyramiding schemes. c provide full disclosure of information and prevent insider trading and other fraudulent practices. d stop the practice of establishing interlocking directorates on America's corporate boards that produced controversial conflicts-of-interest in the governance of American businesses. e force stockbrokers to register with the federal government.