An economic incentive is best described as something that

An economic incentive is something what motivated people to behave in certain way. Economic incentive give you the motivation to pursue your preferences (needs, wants and desires). 

Economic incentive is best described as something that motivates producers or consumers to take action
For example, Andy's main purpose of running his business to get as money as possible. Therefore , money is considered as his economic incentive

hope this helps

The correct answer is a.f.c