What were 3 effects of Lincoln's warning to the south?

After Lincoln's warning to the South, many southerners ignored his warning, taking over federal buildings such as post offices and forts, blocking supply routes to the forts, and starting the civil war by firing at Fort Sumter.

Hey there. I would think the best choice would be B. I say this because choice A is obviously not correct. Choice C well can't be true because the historian has no evidence. Choice D well after they create a question they are not going to get a better understanding of potential research problems. I hope this helped. :)