In a free-enterprise system, producers decide

how much to charge.

which services to buy.

where to shop for goods.

which goods interest them

I believe the Answer is A. How much to charge

How much to charge.

Explanation:

A free enterprise system is one in which businesses have freedom to decide what they produce and how much they charge. This is the system that America uses, as businesses are not told what to do by any government officials. The prices they charge are also determined by competition among other businesses, as they need to remain competitive in order to stay in business.