Which of the Following Characterizes Keynes' Views of Macroeconomics

Multiple Choice

Which of the following characterizes Keynes' views of macroeconomics?  

A)  Fiscal policy should NOT be used to influence the economy. 
B)  The economy eventually tends toward the potential output level. 
C)  For the economy to reach the potential output level, the SRAS curve must shift to the right. 
D)  The economy could be stuck at equilibrium below the potential output level for a prolonged period.