Answer:
I believe that the answers are:
Marriage and professional licensing
Education
Conduct elections
Explanation:
I believe so because a state cannot declare war and print money either.
I hope this helps!
To fight the Spanish-American War. From 1899 until 1902 the United States fought against Spain to take control of Spain's colonies. Spain was defeated and the United States kept the control of Cuba, Puerto Rico and the Philippines which was a big loss for Spain but gave the U.S. a better control of the Caribbean and the Asian South-Eastern regions.
To be eligible to serve, you must be at least 25 years old, been a U.S citizen for the past seven years, and be an inhabitant of the state they represent (at election time).