Which famous economist believed that if governments spend during a depression, they can revive a national economy?

AAdam Smith
BJules Dupuit
CKarl Marx
DJohn Maynard Keynes

Verified Answer :

This would be John Maynard Keynes
!

He was deeply skeptical of austerity measures during recession and during the Great Depression (in 1930s). He argued that during this time budget deficits were not a problem and instead they can help overcome the problems.