In many developed countries,the elderly have already outnumbered children

题目

In many developed countries,the elderly have already outnumbered children
11.---In many developed countries,the elderly have already outnumbered children.
---Yes,and China is reported _____ through a similar process of population aging,and at a faster pace.
A.to go B.to be going C.going D.to have gone
请问,选哪个?

答案

个人理解,应该选B,be reported to do/have done被动固定用法.句子愿意是
---在许多发达国家,老年人数量已经超过儿童.
---是的.据报道,中国人口也正处于老龄化过程,且速度更快.