19. Which of the following treasury regulations would represent a temporary regulation? a. Treas. Reg. Sec.1018T. b. Treas. Reg. Sec. 1018-1T. c. Treas. Reg. Sec. 1-1018-1T. d. all of the above. 20. In which of the following governmental sources would you find the amount of the income tax imposed? a. Internal Revenue Code Section 1. b. Internat Revenue Code Section 2001. c. Internal Revenue Code Section 2501. d. The 16th Amendment of the United States Constitution. e. All of the above