Answer:
D. scarce resources
Step-by-step explanation:
The economical and other resources of any country are not limitless, and the economic system needs to make sure they are spread evenly and used properly. Society, if let on its own wants, would request unlimited goods. Because of the scarcity of services and resources, this is never possible. Therefore, the role of the economy is to make choices on how to reach the goal, and satisfy the want and need without spending too much of the limited resources.