The correct answer to this open question is the following.
Although there are no options attached, we can answer the following.
You did not specify the period or the time in American history. We are going to assume that you refer to the period following the Revolutionary War of Independence.
If that is the case, we can say that what did the U.S. government decide to sell in order to make money to pay debts was to sell bonds to rich people in the United States.
After the Revolutionary War, the government was in deep debt. European countries such as France had loaned a lot of money and sent weaponry and supplies to help the Continental Army during the Revolutionary War. The United States had to pay a lot of money. However, people did not accept this idea of bonds. These bonds were sold only in Connecticut, Massachusetts, and Pennsylvania.
American people were cautious to buy the bonds because to get their promised 6% interest, the first thing was that the Continental Army had to defeat the British troops and win the Revolutionary War.