Final answer:
Poll taxes, literacy tests, and voting registration hindered the 15th Amendment; violence was not specified as an issue.
Explanation:
Poll taxes, literacy tests, and voting registration all hindered the effectiveness of the 15th Amendment in granting voting rights regardless of race. However, violence was not a measure directly specified in the question that impeded the amendment from being effective. Grandfather clauses exempting certain individuals, racial gerrymandering, white primaries, and extralegal intimidation tactics like lynching and house bombings also played a role in suppressing African American voting rights post-Reconstruction.
Learn more about Voting rights suppression post-Reconstruction here:
https://brainly.com/question/1969963
