Which of these are short-term securities issued by the U.S.Treasury and backed by the full faith and credit of the U.S.government?

A) Treasury bills
B) CDs
C) Commercial paper
D) Bonds

Treasury bills (T-bills) are short-term securities issued by the U.S. Treasury. They are backed by the full faith and credit of the U.S. government, making them one of the safest investments. CDs (Certificates of Deposit) are issued by banks, commercial paper is a short-term debt instrument issued by corporations, and bonds can be issued by various entities and typically have longer maturities than T-bills.