Why did southerners agree to the compromise of 1877? ?

The Compromise of 1877 was a purported informal, unwritten deal that settled the intensely disputed 1876 U.S. presidential election. It resulted in the national government pulling the last federal troops out of the South, and formally ended the Reconstruction Era.

I hope this helps. If it does not help, i'd like to ask if this is a multiple choice question and if so I may be able to provide a better answer.