Southerners still wanted slavery, they needed slaves to work in plantations and other jobs. even if Lincoln's ten percent plan went easy on the southerners, they refused to agree with the Union's ways. Which soon lead to Booth assassinating Lincoln. Reconstruction meant that they had to agree on the abolishment of slavery
C and E are definite answers and A and B are definitely not. I suspect D isn't either but in one phase of the Korean war UN troops which were largely American pushed the North Koreans back across their own border. However I would stick with C and E.
