Which of the following is NOT considered a consumption good?

Of the following, the best example of private information is when

A) Michael knows the price of a gallon of milk at the minimart but Michelle doesn't know. B) you know some of your used car's defects but a potential buyer cannot find out about them until after buying. C) you don't know the quality of a used car and must hire a trained mechanic who tells you all its defects. D) you pay the owner of a used car a little extra and she lets you know all of the car's defects.

Identify some of the basic assumptions of monopoly