Answer: B. He wanted to welcome Southerners back to the United States
Step-by-step explanation:
In Lincoln's House Divided Cannot Stand speech he discusses how the North and South must agree on how the future the country is ran, because with the lack of an agreement and multiple factions terrorizing the order, the country simply can not prosper or grow.
Once the Emancipation Proclamation was put into effect in 1863 and the civil war ended two years after that, Lincoln wanted to help reform the South and welcome formally welcome them into the nation, as long as they had recognized that all men, no matter their race or background were considered equal.
With this information alone, we can refute answers A,C, and D because they all involve some sort of punishment for the South, which is what Lincoln was precisely against.