Answer:
C. Lincoln's "Gettysburg Address"
Step-by-step explanation:
On May 30, 1963, Memorial Day, the Vice President at the time and the future 36th President of the US, Lyndon B. Johnson, delivered a speech at Gettysburg, Pennsylvania. Johnson was a supporter of the civil rights movement, and his speech from 1963 was dedicated to this matter. The eloquent words he is referring to is the speech Abraham Lincoln delivered in 1863, a century before Johnson's, known as "Gettysburg Address". Lincoln's speech celebrated the victory of the Union's armies in the Battle of Gettysburg.