What does it mean that the US Constitution is the “supreme law of the land”?

It is the world’s first constitution.
It is above all state constitutions.
It can never be changed.
It rules absolutely.

How should the student cite this source using mla citation format?

The establishment of columbia as the state capital was important because a) it was located in the heart of the upcountry. b) it was located in the heart of the low-country. c) it was already established as a vital industrial center. d) it represented a compromise location central to most citizens.

What were some effects in world war 1 in europe ? ( and only in europe)