Answer:
C) financing government spending through a Treasury sale of bonds that are then purchased by the Fed
Explanation:
The Fed is the only entity that can expand or contract the country's monetary base, and it does it with open market operations. In this case, the Fed is injecting money into the financial system and expanding the monetary base by purchasing treasury bonds, which is basically like my right hand lends money to my left hand, that is why it is called printing money.