Answer:
C. They buy the stuff they want in the goods and services market and sell their labor in the resource market.
Explanation:
The circular flow model describe how money moved around/distributed within society.
Every households can play the role as consumers and producers within the circular flow model.
As a consumers, households use their money to purchase goods and services from other producers. As a producers, households sell their labors to another business in exchange of salary/wage. The salary that the households receive will be circulated back when they purchase another goods/services and the cycle will keep going on.