We know about the lewis and clark discoveries because of the detailed journals they used during their expedition. They kept a detailed account of everything they did and saw.
Answer:
C) they demonstrated at the presidents ability to communicate with the American public
Liberty matters because it respects the ability of an individual to make sole decisions that is their "life". Liberty is freedom, being able to choose the way,path or direction you want your life to be as, it is an inalienable right that every human being deserves to inherit. There is everything to gain through liberty but if used to inflict oppression or do things unjustly it can destroy a society and lives. The constitution is a perfect example of liberty being respected but also realising and culturing that liberty still has to give honorship to authority. If the entire world lost all liberty, I couldn't imagine how we would live as a people.
