Which Is the Best Explanation of Deficit Spending,an Idea Promoted

Which is the best explanation of deficit spending,an idea promoted by John Maynard Keynes?

A) borrowing aggressively during a time of economic contraction
B) limiting credit to foreign entities
C) erecting high tariffs to protect local producers
D) cuts in government spending during economic boom times
E) patience during a downturn to allow the market corrects itself