C. It is important to keep fighting the Civil War in order to preserve the Union of the United States.
Explanation:
The famous "Gettysburg Address" by President Abraham Lincoln gave at Gettysburg in 1863 is a rallying speech to call the people to keep the fight for equality and freedom alive. Lincoln used this platform to highlight the need to keep the fight going until it is won so as not to 'de-consecrate' the sacrifice of the fallen soldiers at Gettysburg.
The given lines from the speech calls upon the people to <em>"take increased devotion to that cause for which they gave the last full measure of devotion"</em>. Lincoln used this speech to call for continued action and justified his resolve of continuing the Civil war that has been raging in their nation. For he believes that the <em>"government of the people, by the people, for the people, shall not perish from the earth"</em>. This excerpt shows the speaker Lincoln's decision to continue the fight in order to preserve the Union of the US.
