Final answer:
The false statement is option C, as the debt-to-GDP ratio in the U.S. actually increased between 1980 and 2020.
Step-by-step explanation:
The false statement is option C, which says that the debt-to-GDP ratio in the U.S. decreased between 1980 and 2020. In reality, the debt-to-GDP ratio in the U.S. increased during this period.
According to the information provided, the government ran large deficits in the 1980s and early 1990s, causing the debt-to-GDP ratio to rise sharply. Budget surpluses arrived from 1998 to 2001, leading to a decline in the debt-to-GDP ratio. However, budget deficits starting in 2002 and the recession in 2008-2009 caused the ratio to increase again.
Therefore, the correct option is C, as the debt-to-GDP ratio in the U.S. actually increased between 1980 and 2020.