Answer:
The correct answer is D. The Compromise of 1866 didn't state that some federal troops would remain in the South to protect the civil rights of African Americans.
Explanation:
The Compromise 1877 was an informal agreement that would resolve disputes over the presidential election in 1876, with both sides accusing each other of extensive electoral fraud and in which Republican Rutherford B. Hayes won against Democrat Samuel Tilden against all but one electoral vote. Armed groups were rumored to be marching toward the capital, prompting President Grant to order increased military readiness.
The result was the end of the Reconstruction period when the last vestiges of the federal occupation of the southern states since the end of the Civil War disappeared. At the time of the Compromise, only federal troops remained in Louisiana, South Carolina and Florida. When the troops withdrew, many white Republicans, so-called scalawags, also left the South. A direct result of this was that the Republican governments in these states quickly lost power to conservative Democrats.
