If the multiplier is 4, the marginal propensity to consume (MPC) must be Naim 12:08 Economics Chapter 12 If the multiplier is 4, the marginal propensity to consume (MPC) must be A) 0.25. B) 0.5. C) 0.75. D) 1. Answer: C Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+