Answer:
C) the United States would have to become either all slave or all free.
Step-by-step explanation:
Abraham Lincoln said this quote on June 6th, 1858. During that time the US was facing the problem with slavery and the US Supreme Court Dred Scott's decision was fresh at that moment.
Lincoln used this phrase from the Bible to explain that the government could not sustain half slave and half free US. So slavery should either be accepted by all states or denied by all.