Answer:
B. He was speaking to those present and also to the nation at large (who would read his words) and wanted to discuss the battlefield and also the issue of freeing southern slaves.
Step-by-step explanation:
Althought he was referring to a time in the past, Lincoln was addressing the citizens present at the time to participate as a whole nation. His main concern with the speech was to convince others about his ideas of men and their nature, even to those that were ensalved at the time.