Sentence Correction (SC) | Re: QOTD: Nobody knows exactly how many languages there

Nobody knows exactly how many languages there are in the world, partly because of the difficulty of distinguishing between a languageand 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.