Which of the following is commonly issued by the U.S. Treasury?

Treasury Bills are short-term debt securities issued by the U.S. Treasury to help finance the national debt and manage the government’s cash flow. They are sold at a discount to their face value and do not pay interest in the conventional sense; instead, the difference between the purchase price and the face value at maturity represents the investor's return. Treasury Bills typically have maturities of one year or less and are considered one of the safest investments in the world, backed by the full faith and credit of the U.S. government.

In contrast, commercial paper is an unsecured, short-term debt instrument issued by corporations, while repurchase agreements are used primarily in the context of monetary policy and liquidity management by financial institutions. Banker's acceptances are a form of financing used in international trade, typically issued by commercial banks. Thus, these alternative instruments serve different roles in the financial markets and are not part of the U.S. Treasury’s offerings.