B) The Supremacy Clause states that no judge can contradict federal law.
This means that the The US Constitution and the laws made in accordance with it by the federal government are the supreme law of the land, and cannot by contradicted. The only exception is the power of judicial review, held by the Supreme Court, to strike down laws declared unconstitutional. This actually is not a real exception though, because it indicates that the law did not comply with the Constitution in the first place.
