Final answer:
The scenario described in the question is an example of the changing balance of power between the states and federal government in response to societal needs.
Step-by-step explanation:
The scenario described in the question is an example of option c) The changing balance of power between the states and federal government in response to societal needs. Federalism is a system that divides powers between the federal government and state governments, and the balance of power between the two levels of government can shift over time based on societal needs. In this scenario, the changing balance of power is evident as state governments take on a greater role in addressing the specific needs and interests of their citizens in policy areas such as access to abortion, distribution of alcohol, gun control, and social welfare benefits.