Answer:
D
Step-by-step explanation:
A simplifying assumption is a way of making a model simpler without affecting any of its important conclusions. The purpose of a simplifying assumption is to rid a model of extraneous detail so its essential features can stand out more clearly. We might assume that there are only two goods that households can choose from or that there are only two nations in the world. We make
such assumptions not because they are true, but because they make a model easier
to follow and do not change any of the important insights we can get from it.