Which of the following statements is true of pipe transactions? a. as part of the pipe contract, the company often agrees to register the restricted securities with the sec after 90 days of the pipe closing. b. pipe transactions involving a healthy firm can also be executed without the use of an investment bank but result in a cost increase of 7 to 8 percent of the proceeds. c. under federal securities law, they can be resold to investors in the public markets immediately even if they are not registered. d. as part of the pipe contract, the company often agrees to register the restricted securities with the sec, usually within 90 days of the pipe closing.