Where do state constitutions get their power from?

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Explanation:

 The Tenth Amendment declares, "The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people." In other words, states have all powers not granted to the federal government by the Constitution.

  In the Tenth Amendment, the Constitution also recognizes the powers of the state governments. Traditionally, these included the “police powers” of health, education, and welfare.

d) all choices are correct