Answer:
Methodist and Baptist.
Step-by-step explanation:
Before and after the end of the American Civil War in 1865. Baptist and Methodist Churches allowed African Americans to practice their Christianity religion without direct control. of the Whites. This led to an influx of blacks to joined both religions at great length during this period.
Hence, in this case, the correct answer is that the denominations that had the largest followings among blacks after the Civil War is "METHODIST AND BAPTIST."