Which of the following event would increase U.S. GDP?

Group of answer choices

The U.S. federal government pays $3 billion in salaries to soldiers in the military.

The U.S. federal government pays $3 billion in pensions to government workers.

The U.S. federal government pays $3 billion in interest on the national debt.

The U.S. federal government pays $3 billion in interest to foreign holders of U.S. government bonds.