Answer :
"A.Decent people, both in the North and in the South, were horrified and outraged." Many people across the country had not witness the horrors of the south. This was a turning point.
Answer: The right answer is letter A
Explanation: King and other marchers demonstrated against the city’s continuing practices, Connor’s police used all sorts of violence on the protesters while millions of outraged Americans watched the battles on television. King was arrested. While incarcerated, he wrote his now famous “Letter from Birmingham City Jail,” a stirring defense of the nonviolent strategy that became a classic document of the civil rights movement.