Answer:
A) inspire the nation and Union soldiers
Step-by-step explanation:
The ideas behind the speech were to raise the morale of the people and to remind them of the fact that people in Gettysburg died for freedom, nation, equality and better future of the States.
This is accented when he says that, as an honor to the dead, to make their lives meaningful, they should fight "that this nation, under God, shall have a new birth of freedom, and that government of the people, by the people, for the people, shall not perish from the earth."
He doesn't mention the South, slaves or announces the new leader. His main goal is to wake the spark of the nation to fight united for freedom and relief.