Answer: C. Immigration Act.
Explanation: The Great Society program was created to mitigate the problems of racial injustice and poverty. During this time, projects were centered around providing good education, transportation, medical services, etc.
The Immigration Act was enacted in 1924, and it was a U.S. federal law that sought to prevent immigration from Asia and other countries.
The Clean Air Act was directed towards maintaining the environment.
The Head Start Act was to help underprivileged children gain free education.
The Social Security Act aimed at increasing benefits and reducing poverty.
The Voting Rights Act allowed minorities to vote.