Which excerpt from “Lessons of Dr. Martin Luther King, Jr.” by Cesar Chavez provides evidence that Dr. King promoted nonviolence?

He once stopped an armed mob, saying: "We are not advocating violence. We want to love our enemies. I want you to love our enemies. Be good to them. . . .”
But he said, "If I am stopped, the movement will not stop. If I am stopped, our work will not stop. For what we are doing is right. What we are doing is just. . . ."
Dr. King's dedication to the rights of the workers who are so often exploited by the forces of greed has profoundly touched my life and guided my struggle.
The enemies of justice want you to think of Dr. King as only a civil rights leader, but he had a much broader agent.