African americans that migrated to the great plains were called

African Americans that migrated to the Great Plains were called Exodusters.

Explanation:

The name came from the African Americans taking part of the Exodus movement.

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.

a memoir is the correct answer