Answer:
"Some workers were arrested or killed" best describes how civil rights workers were treated during the Freedom Summer campaign.
Step-by-step explanation:
The Mississippi Summer Project which is also familiar as Freedom summer campaign in the United States organized by the Council of Federated Organizations (COFO), was a volunteer campaign and launched in June 1964. The motive was to register large number of African-American voters in Mississippi.
But number of white residents from Mississippi criticized the black communities by pronouncing them "unshaven and unwashed trash".Even in the 10 week campaign 37 churches and 30 Black homes were bombed, 80 Freedom Summer workers were battered, 4 civil rights workers were killed and at least 3 Mississippi blacks were murdered as they favored Civil Rights Movement.