Which of the following correctly identifies the nature of the legal citations mentioned?

a. 18 USC Section 2383 - This is a federal law related to a specific criminal offense.
b. 410 US 113 (1973) - This is a decision from the Supreme Court, and the number 410 relates to the volume of the U.S. Reports.
c. Cal. Com. Code §2204 - This is a provision within California's Commercial Code, governing certain aspects of commercial transactions.
d. 161 F.2d 774 (9th Cir. 1947) - This is a case heard in the 9th Circuit Court of Appeals in 1947.
e. 36 CFR § 7.8 - This is a regulation found in the Code of Federal Regulations (CFR), specifically related to a particular subject matter.
f. US Const., Art. 1, Sect. 8 - This is a reference to Article 1, Section 8 of the United States Constitution, which grants specific powers to Congress.