Indicate whether the following statements are "True" or "False" regarding the validity and weight of tax sources. a. If an answer is not in the Code, it may be necessary to resort to the Regulations and judicial decisions. b. The language of the Code often is extremely difficult to comprehend. c. Treasury Regulations are often said to have the force and effect of law. d. Revenue Rulings issued by the IRS carry more weight than Treasury Department Regulations