The correct answer is A) Freedom Summer.
Freedom Summer was the coordinated effort of the Southern Christian Leadership Conference (SCLC), the Student Nonviolent Coordinating Committee (SNCC), the Congress of Racial Equality (CORE), and the National Association for the Advancement of Colored People (NAACP).
Freedom Summer of 1964 aimed to elevate the number of black people voters in Mississippi, That is why it was also known as the Mississippi Summer Project. But the problem was that the state police and the Ku Klux Klan aggressively attacked and hurt civil right activists.