Steven T. answered 06/18/20
AP Economics teacher with 25 years experience following economic data
I would argue any of these are components of an economy. However, there are various types of economies (command, free-market, laissez-faire) that prioritize different things so it really depends on what type of economy you're talking about. What is best for one economy to one country may not be best for another. I see the word "best" in the question, but that's ambiguous. If I MUST choose, I would choose answer C.