If the marginal propensity to consume (MPC) decreases, then Naim 12:06 Economics Chapter 12 If the marginal propensity to consume (MPC) decreases, then A) the marginal propensity to save (MPS) decreases. B) the multiplier decreases. C) the multiplier increases. D) MPC + MPS is less than 1. Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+