Economists Such as James Tobin and Paul Samuelson Claimed That

Economists such as James Tobin and Paul Samuelson claimed that _________ provided solid evidence of the effectiveness of Keynesian policies.

A) increases in deficit spending accompanied by extremely low unemployment during WWII
B) increases in taxes accompanied by rising federal budget surpluses
C) increases in the money supply accompanied by falling interest rates
D) price controls accompanied by inflation