What is the supremacy clause of the US Constitution? the part that outlines the powers specifically given to the states
the part that gives Congress the right to create and collect taxes
the part that says that federal laws are more powerful than state laws
the part that declares that states are only required to follow state laws

How did the nazis lead germany to war in europe and, with their collaborators, kill millions—including systematically murdering six million jewish people?

On average, being married has a(n) effect on happiness.

Ascientist successfully predicts the outcome of an experiment. you watch carefully and know he didn't cheat. the scientist's success shows that: a) the scientist knows absolute truth about this experiment; success is not possible unless you know the truthb) the scientist was just lucky; no one ever knows what's going on, so successful predictions require luckc) the scientist may know the truth, or at least know something that is close to the truth, or the scientist may have gotten lucky this time; you can't be absolutely sured) the scientist really was cheating, even though you didn't see the cheating; no one can get things right, except by cheatinge) the scientist spent the night at a particular hotel chain and go a free breakfast, giving the scientist the ability to do amazing things