How many of us ____, say, a meeting that is irrelevant to us would be interested in the discussion?

A. attended

B. attending

C. to attend

D. have attended

这个题目的答案是选择B，现在分词作后置定语，how many of us与attend是主动关系。

我现在想问的是：这个句子可不可以理解成how many引导的主语从句，从而让A或者D在这个主语从句中作动词成分呢？