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阅读下列短文，从每题所给的四个选项（A、B、C、D）中选出最佳选项。

Mr. Lewis was a dance teacher. He was a nice man and always had a lot of students. One year he moved to a new town, and was soon teaching many students in the dance school there, but he decided to move again to a big city. He would have more work there.

    When one of his students heard that he was going to leave, she said to him, "The new teacher won't be as good as you are." Mr. Lewis was happy when he heard this, but he said, "Oh no. I'm sure he'll be as good as I am ---- or even better." The student said, "No. Five teachers have come and gone while I've been here, and each new one was worse than the last."

父母离异后初中生小柳跟着爸爸一起生活，可是爸爸脾气暴躁，经常毒打他。发现此问题后，社区工作者联系了张律师对孩子进行法律援助。张律师向社区工作者反馈：结合本案，根据《反家庭暴力法》相关条文规定，小柳爸爸实施家庭暴力严重侵害小柳合法权益，小柳妈妈可以向人民法院申请依法撤销爸爸的监护人资格，另行指定妈妈为监护人。对此，下列说法正确的是（    ）