B. influenced by social norms.
hope this helps :)
Assuming that it is now the president can not rule things that are unconstitutional though his veto is basically that he can not pass laws and he can not make laws
Explanation:
first the Congress proposes a bill then accepted by the president ( the president can also veto) then pass through judicial branch and it decides if it's constitutional
How WHAT might affected life in Medieval Europe?
