GMAT Sentence Correction (SC) | Re: Because there is not a linguistic census in france, as there

Because there is not a linguistic census in france, as there is for Britain, there is difficulty in estimating the number of speakers of Brento, a Celtic language.

A)

B) Because there is no linguistic census in france, unlike Britain, it is difficulty to estimate

c) Unlike Britain, there is no linguistic census in France, and that fact makes for difficulty in estimating.

d) There is not a linguistic census in france, as there is for britain, a fact making for difficulty in the estimation of

e)