Answer:
Correct answer is gave African Americans the right to vote.
Step-by-step explanation:
First and third option are not correct as actually this is something that was prohibited by this laws that were introduced in 1964/65. They were regarded as discriminatory.
Second option is correct as African Americans finally obtained the right to vote in the southern states, where they were discriminated for a long period of time.
Last option is also not correct as it still did not include everyone in this process.