60. The belief that education is indispensable to all children ________.

　　[A] is indicative of a pessimism in disguise

　　[B] came into being along with the arrival of computers

　　[C] is deeply rooted in the minds of computered advocates

　　[D] originated from the optimistic attitude of industrialized countries

        A 和 B 是什么意思？句子不理解!