Answer:
War between South and North to settle an issue of slavery.
Explanation:
Hope that helps.
I think it would have been B, But I am not totally sure.
1863-General Lee lead the Confederate troops into Pennsylvania. He surprised the units in Gettysburg and the battle was the most crucial and bloodiest of the war. The victory at Gettysburg belonged to Lincoln and the Union. Turning point; last offensive attack of the South.
Labor was a problem in the southern colonies because slavery was free labor so the south became dependent on slavery to be successful.