Instead of using "set off" used skyrocketed, or rocketed or left an impact or created a ripple effect, something around those lines.
Also, if you want to say the question from the novel use a single quotation, ', instead of a double. It makes more sense that way.
Summary
In the same riverbed where the story began, it is a beautiful, serene late afternoon. A heron stands in a shaded green pool, eating water snakes that glide between its legs. Lennie comes stealing through the undergrowth and kneels by the water to drink. He is proud of himself for remembering to come here to wait for George but soon has two unpleasant visions. His Aunt Clara appears “from out of Lennie’s head” and berates him, speaking in Lennie’s own voice, for not listening to George, for getting himself into trouble, and for causing so many problems for his only friend. Then a gigantic rabbit appears to him, also speaking in Lennie’s own voice, and tells him that George will probably beat him and abandon him. Just then, George appears. He is uncommonly quiet and listless. He does not berate Lennie. Even when Lennie himself insists on it, George’s tirade is unconvincing and scripted. He repeats his usual words of reproach without emotion. Lennie makes his usual offer to go away and live in a cave, and George tells him to stay, making Lennie feel comforted and hopeful. Lennie asks him to tell the story of their farm, and George begins, talking about how most men drift along, without any companions, but he and Lennie have one another. The noises of men in the woods come closer, and George tells Lennie to take off his hat and look across the river while he describes their farm. He tells Lennie about the rabbits and promises that nobody will ever be mean to him again. “Le’s do it now,” Lennie says. “Le’s get that place now.” George agrees. He raises Carlson’s gun, which he has removed from his jacket, and shoots Lennie in the back of the head. As Lennie falls to the ground and becomes still, George tosses the gun away and sits down on the riverbank.
B. To develop a character or characters - APEX
