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 expenditure multiplier B The expenditure multiplier (Choice C) No calculation is needed because AD will decrease by \[\$6\] billion C No calculation is needed because AD will decrease by \[\$6\] billion (Choice D) The balanced budget multiplier D The balanced budget multiplier (Choice E) The money multiplier E The money multiplier