Answer: Establishing post offices
Explanation: The "Elastic Clause" of the Constitution grants Congress power to pass unspecified laws "necessary and proper" for the exercise of its expressed powers, and since this is an unspecified law it is OK.
A. The churches and higher ups were pretty much the only literate ones during the middle ages.
Public education because it gives you the skills to provide a living for yourself.
Elements that are essential for a democratic regime have disappeared in many Latin American countries. Checks and balances and more.
Cronyism is the political favor