问题详情

In Paragraph 3， the phrase "this need" refers to 查看材料

A.the need to prolong the lives of old people

B.the need to enrich th， life of the retired people

C.the need to build profit-making nursing homes

D.the need to take care of a sick and weak person

请帮忙给出正确答案和分析，谢谢！