The cost of borrowing is equal to marginal propensity to consume. 21. Investment is
(a) An injection that increases aggregate demand
(b) An withdrawal that increases aggregate demand
© An injection that decreases aggregate demand
(d) An withdrawal that decreases aggregate demand
(a) An injection that increases aggregate demand
(b) An withdrawal that increases aggregate demand
© An injection that decreases aggregate demand
(d) An withdrawal that decreases aggregate demand