What event made the Compromise of 1877 possible?
A. Republicans had lost interest in southern issues.
B. Democrats had gained enough power to get things they wanted
from Republicans.
C. Republicans had promised to remove federal troops once
Democrats had control in all southern states.
D. Democrats had won the presidency.

C.

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Explanation:

The Compromise of 1877 ended the election dispute over the election of 1876 and made Republican Rutherford B. Hayes the President of the United States in exchange for rapidly removing federal troops which had occupied the South since the end of the Civil War , as well as other concessions to Southern Democrats.

b

explanation:

a.

congress passed laws allowing for free passage between states.