The correct answer is A) they wanted to prevent abolitionist from controlling Congress.
The statement that best explains why politicians in the South wanted to admit an equal number of free states and slave states to the Union was that they wanted to prevent abolitionist from controlling Congress.
During the Reconstruction after the victory of the Union Army over the Confederated Army, many politicians in the Southern states have concerns about the integration of the members of Congress. Southern politicians were afraid that Congress could be controlled by congressmen that favored abolition. That is why they demanded an equal number of free states and slave states to the Union.
