Answer: (B) They quietly left white churches and formed their own religious organizations, which became centers for the African-American community.
Step-by-step explanation:
Reconstruction refers to the time after the American Civil War when the South and indeed the whole country, was being rebuilt from the ravages of war. The South was under occupation from the Union army which allowed the North to enforce its anti-slavery rhetoric on the South.
During this time, Africa-Americans found that with the limited freedoms they had they could do things of their own accord including worshipping God amongst themselves. They therefore left white churches quietly and founded their own and these have been a very important part of African-American life since then.