40. Assume a model with anincome tax rate of t = 0.25 and a marginal propensity to consume of c = 0.8.What could cause the level of equilibrium income to decrease by 1,000?

   A. A decrease in autonomous netexports of 400

   

   b. A decrease in autonomoussaving of 200

  

   c. A decrease in governmentpurchases of 250

   

   d. A decrease in governmenttransfer payments of 500

   

   e. An increase in autonomousinvestment of 500

是不是D选项也可以？哪位大神给指导一下。