Why do states' rights advocates oppose the expansion of national government?

a. They believe that expansion violates the autonomy granted to states in the Tenth Amendment.

b. They believe that expansion violates the autonomy granted to states by the Necessary and Proper Clause.

c. They believe that the Tenth Amendment only allows the national government to regulate the economy.

d. They are concerned that the national government will steal tax money needed by the states.

Option A, They believe that expansion violates the autonomy granted to states in the Tenth Amendment.

Explanation:

The 10th Amendment of the American Constitution clearly endows each state in the U. S the right to delegate powers or decisions in the legislation according to the states and the will of the people.

States' rights advocates believe that if the power of the national government is expanded, it will infringe the federal rights of the states. They advocate that the powers of the national government should be limited in order to sustain the federal structure of the American Constitution.

Therefore, they fear that if the power of the national government is expanded, the autonomy granted to states in the Tenth Amendment will be violated.