The Constitution's Supremacy Clause

The Constitution's supremacy clause

A) does not apply to state and local matters.
B) gives the states superiority over the national government's Constitution and laws.
C) made the Constitution,the laws of the national government,and the national government's treaties the supreme law of the land.
D) is vague about which level of government should prevail in a dispute involving federalism.
E) makes the president supreme in any constitutional conflicts with the other two branches.