U.S. Federal Government Marketable Securities

D

The correct answer is D. T-bills.

T-bills, also known as Treasury bills, are short-term debt securities issued by the U.S. federal government through the Department of the Treasury to finance government spending. T-bills are considered to be one of the safest investments because they are backed by the full faith and credit of the U.S. government.

Commercial papers, on the other hand, are short-term unsecured promissory notes issued by corporations to finance their short-term liquidity needs. Negotiable certificates of deposit (CDs) are time deposits issued by banks or other financial institutions that can be traded in the secondary market. Repurchase agreements, also known as repos, are transactions in which a security is sold with an agreement to repurchase it at a later date at a specified price.

Therefore, the only security among the options listed that is issued by the U.S. federal government is T-bills.