阅渎下面短文，请从短文后所给各题的4个选项(A、B、C、D)中选出1个最佳选项，并在答题卡相应位置上将该项涂黑。 I have a friend named Monty Roberts who let me use his horse ranch in San Ysidro to put on fund-raising events for youth at risk programs. The last time I was there he introduced me by saying, "I want to tell you why I let Jack use my house. It all goes back to a story about a young man, the son of an itinerant horse trainer who went from ranch to ranch, training horses. As a result, the boy’s high school career continually interrupted. When he was a senior, he was asked to write paper about, what he wanted to do when he grew up. “That night he wrote a seven-page paper describing his goal of owning: a horse ranch some day. He wrote about his dream in great detail and drew a diagram of a 200-acre ranch. Then he drew a detailed floor plan for a 4,000-square-foot house that would sit on the ranch. Two days later he received his paper back. On the front page was a large red F with a note that read, 'See me after class”. “The boy went to see the teacher after class and asked, ‘Why did I receive an F?' The teacher said, ‘This is an unrealistic dream for a boy like you, having no money and from an itinerant family. If you will rewrite this paper with a more realistic goal, I will reconsider your grade.’" "The boy went home and thought about it long and hard. Finally, after sitting with it for a week, he turned in the same paper, making no changes at all. He stated, ‘You can keep the F and I'll keep my dream.’” Monty then turned to the assembled group and said, ”I tell you this story because you are sitting in my 4,000-square-foot house in the middle of my 200-acre horse ranch. I still have that school paper framed over the fireplace.” He added, "Two summers ago, that same schoolteacher brought 30 kids to camp out on my ranch for a week. When the teacher was leaving, he said, ‘Look, Monty, when I was your teacher, I was something of a dream stealer. I stole a lot of kids' dreams. Fortunately you were bold and ambitious, enough not to give up on yours.’"