Suppose That the Multiplier Is 4, Autonomous Investment Rises by $50

Multiple Choice

Suppose that the multiplier is 4, autonomous investment rises by $50 billion, and autonomous consumption falls by $50 billion at the same time.What will be the effect on equilibrium GDP?  

A)  Equilibrium GDP demanded will decrease by $200 billion. 
B)  Equilibrium GDP demanded will be the same, but the type of goods produced will be different. 
C)  Equilibrium GDP demanded will increase by $200 billion. 
D)  Equilibrium GDP demanded will increase by $400 billion.