Answer: b. He wanted to remind people about what the nation’s founding ideals were.
Step-by-step explanation:
In 1863 President Lincoln delivered one of the most iconic speeches of all time known as the Gettysburg address as he opened the Gettysburg cemetery which was constructed for dead Union soldiers during the Civil War.
He began the address by referring to the founding of the nation 87 years in the past the purpose of which was to remind people why the Founding Fathers founded the United States and the ideals they did so with.
He wanted people to remember that the United States was founded on the principles of liberty for all people and not just people of a certain race with the aim being to justify the Civil War and its goal of ending slavery.