Answer:
The Part A discussed the idea of freedom.
Therefore, the sentence from the Gettysburg address that best supports the answers to Part A is:
* a- four score and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty, and so dedicated to the proposition that all men are created equal.
Explanation:
The above sentence supports the central idea of freedom, especially for the slaves. It was for their emancipation that the civil war was fought. Emancipation connotes freedom and the sense that "all men are created equal." The above remark was the opening sentence of President Abraham Lincoln's short address at Gettysburg, Pennsylvania on November 19, 1863. The occasion was the dedication of the burial ground of soldiers who lost their lives fighting for freedom.