Investment spending in Gerbilia decreased by \[\$6\] billion. What measure can be used to determine the final impact of the change in investment spending on aggregate demand (AD)? Choose 1 answer: Choose 1 answer: (Choice A) The tax multiplier A The tax multiplier (Choice B) The money multiplier B The money multiplier (Choice C) The balanced budget multiplier C The balanced budget multiplier (Choice D) No calculation is needed because AD will decrease by \[\$6\] billion D No calculation is needed because AD will decrease by \[\$6\] billion (Choice E) The expenditure multiplier E The expenditure multiplier