gwd-10-21

GWD-24-Q 21:---not A?

Nobody knows exactly how many languages there are in the world,
            partly because of the difficulty of distinguishing between a language
            and the sub-languages or dialects within it, but those who have tried to count typically have found about five thousand.

A.     and the sub-languages or dialects within it, but those who have
                tried to count typically have found

B.       and the sub-languages or dialects within them, with those who
            have tried counting typically finding

C.      and the sub-languages or dialects within it, but those who have
            tried counting it typically find

D.      or the sub-languages or dialects within them, but those who tried
            to count them typically found

E.       or the sub-languages or dialects within them, with those who have
            tried to count typically finding

Why not C?

Count should be followed by it, A doesn’t have it after count.

要加也是加them 用于指代languages 但是加them会指代不清 所以干脆不加