Select from the dropdown list the correct item for the follow a. CA-2 is an abbreviation for the b. Fed.cl. stands for c. The abbreviation aff'd stands for d. The abbreviation rev'd stands for e. The abbreviation rem'd stands for f. Cert. denied stands for g. The abbreviation acq. stands for h. B.T.A stands for i. USTC stands for j. AFTR stands for k. F.3d stands for 1. F. Supp. stands for m. USSC stands for the n. S.Ct. stands for o. D.Ct. stands for Rank the following items from the lowest (1) to highest (6) authority in the Federal tax law system. Ranking a. Interpretive Regulation b. Legislative Regulation. c. Letter Ruling d. Revenue Ruling. e. Internal Revenue Code. f. Proposed Regulation