A reduction in U.S net exports would shift U.S. aggregate demand

a. rightward. In an attempt to stabilize the economy, the government could increase expenditures.

b. rightward. In an attempt to stabilize the economy, the government could decrease expenditures.

c. leftward. In an attempt to stabilize the economy, the government could increase expenditures.

d. leftward. In an attempt to stabilize the economy, the government could decrease expenditures.

I wonder whether the answer is C or D

please explain clearly.