How does article 6 establish the supremacy of the constitution?

Article VI reads, in part: 
This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding. 

This is the supremacy clause.

It is c because it shows how the author is stating their own oppinion about the protagonist