4. Were African Americans immediately able to vote after the 15th amendment was
ratified?

Not immediatelty

Explanation:

The 15th Amendment granting African-American men the right to vote was adopted into the U.S. Constitution in 1870. It wasn't until the Voting Rights Act of 1965 that legal barriers were outlawed at the state and local levels if they denied African-Americans their right to vote under the 15th Amendment.

the correct answers are 1, 2 5, 6