D. To push for expanded voting rights for African Americans
Freedom Summer was also known as the Mississippi Summer Project. It occurred in the summer of 1964, aimed at getting more black Americans in Mississippi registered to vote. Civil rights organizations such as the Congress on Racial Equality (CORE) and the Student Non-Violent Coordinating Committee (SNCC) were sponsors of the voter registration drive.
The goal of the campaign known as Freedom Summer was to push for expanded voting rights for African Americans. The correct option among all the options given in the question is option "d". It was also known by the name of Mississippi Summer Project. It was a campaign in Mississippi that started in the year 1964 and it was an attempt to include as many African Americans voters in the voting procedure as possible.
try and search it up like copy the question and google has some article or answers i don't really understand that work because i haven't done that but search it up it will prob tell you the answer.