The correct answer is "C".
The Gettysburg address is one of the most influential speeches in United States history. This speech was made by President Lincoln. It was relatively short, only have 271 words.
In the speech, Lincoln urges the audience to resolve that "soldiers will not have died in vain, as the US government will never perish from the earth". This statement urges the people to make all the efforts possible in order to aid the government in its task to make the United States a great nation in which a person's liberties should always be guaranteed.