单选题 Which of the following can best conclude the main idea of the passage?

【正确答案】 C
【答案解析】[试题分析] 本题为意图理解题。
[详细解答] 文章的主题已在第一段就指明了,即Their level of education has to be qualitatively redefined and adapted to current demands.一句,综观全文,作者想表达的就是这个思想,C项符合。