The law of increasing opportunity costs arises because

A. as society produces more and more of a good, people want the good less and less.

B. as society produces more and more of a good, people find more creative ways to make the good which are less expensive.

C. as society produces more and more of a good, people are forced to use resources which are less and less well suited to the production of that good.

D. as society produces more and more of a good, people become better and better at making the good.