Final answer:
African American men, women, and young people between 18-21 are three groups who have been disenfranchised but were later granted suffrage through the 15th, 19th, and 26th Amendments, respectively.
Step-by-step explanation:
Three groups that have been disenfranchised and later granted suffrage through amendments are:
- African American men, who were enfranchised by the 15th Amendment in 1870.
- Women, who gained the right to vote with the ratification of the 19th Amendment in 1920.
- Youth between the ages of 18 and 21, who were granted the right to vote by the 26th Amendment in 1971.
Despite these constitutional amendments, obstacles like poll taxes, literacy tests, and Jim Crow laws were used to suppress the African American vote well into the 20th century. Literacy tests were not abolished until the Voting Rights Act of 1965, signed by President Lyndon Johnson. Now, more minorities are voting than ever; however, the battle against voter suppression continues.