单选题 By "a system of built-in obsolescence" the author means ______.

A、 no formal systems exist in modern industrial society
B、 old people have no status in modern industrial society
C、 young people have chances in modern industrial society
D、 knowledge changes rapidly in modern industrial society

【正确答案】 B

【答案解析】[分析] 推断题型。根据开篇的第二、三句In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life in order to keep up with rapidly changing knowledge．(社会有其体系的内在弊端。没有终生继续教育的正规体系以使老年人跟上知识的更新。)