The consumer is in equilibrium when Naim 21:45 Microeconomic Theory Chapter 4 The consumer is in equilibrium when A) MRT = MRS. B) Px/Py = MUx/MUy. C) the budget line is tangent to the indifference curve at the bundle chosen. D) All of the above. Answer: All of the above. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+