[求助]语法OG里的问题

noss

选那个，解释一下吧：）

84. One legacy of Madison Avenue's recent campaign to appeal to people fifty years old and over is the realization that as a person ages. their concerns change as well.

(A)  the realization that as a person ages, their

(B)   the realization that as people age, their

(C)  to realize that when a person ages, his or her

(D)  to realize that when people age, their

(E)   realizing that as people age, their

ranning

选B

用be动词做谓语的，一般要遵循平行的原则
to do is to do
doing is doing
n. is n.

所以One legacy of .... is the realization that

A中a person跟their搭配不当

chinada

ls的你这结构是平行了,可逻辑意思不对,one legacy=realization?先排除的就是A B
人变老用when,不是as, 排除 E
不是指一个人,排除 C
选 D