Answer:
D. a new birth
Step-by-step explanation:
In this speech, Lincoln uses the idea of a "new birth" in order to inspire a sense of hope in his audience. He tells us that in the past, men died at Gettysburg in order to protect the freedom of the country. Now, it is everyone's duty to ensure that this sacrifice was not in vain, and that the country overcomes the war and remains united and free. Lincoln, therefore, gives the audience a new sense of purpose, as well as a new sense of hope.