What factor led to the formation of the ku klux klan and similar groups?
african americans became more prosperous than whites.
african americans started riots in cities.
african americans stopped whites from voting.
african americans were making progress toward equality.

African Americans were making progress toward equality.

Explanation:

After the Civil War, African Americans were granted the same rights and citizenship as White Americans. Many people, particularly in the South, disliked this. As African Americans began to make more progress towards equality, several racist and segregationist groups were established. This included the Ku Klux Klan. Their main purpose was to ensure that African Americans remained disadvantaged and underprivileged.

answer; i believe its (cpr);