Answer:
B now we are engaged in a great civil war testing whether that nation or any nation so conceived and so dedicated can long endure
Step-by-step explanation:
At the beginning of the speech, Lincoln points out how the nation was conceived in freedom and dedicated to the proposition that all men are created equal. After this he leaves the climax to the next sentence, where he quests if a nation conceived in this way can last for a long time before the civil war that the country was facing.