Answer:
C. by setting tax rates and enforcing regulations that reflect citizens' preferences
Explanation:
The construction granted each states the power to create their own laws. These laws can be designed specifically to support the economic activities and the social principles that the citizens prefers.
For example, The southern states such as Texas, Indiana, and Illinois generally have more people who work in agriculture-related fields. This made the government in these states generally create legislations that provide incentives for the agricultural sector (maybe by giving lower taxes for a certain agricultural products or providing loans and educations to farmers)