Sentence Correction (SC) | Re: Cooperative apartment houses have the peculiar distinction

Cooperative apartment houses have the peculiar distinction of being dwellings that must also operate as businesses.
(A) of being dwellings that must also operate as businesses
(B) of dwellings that must also operate like business
(C) that they are dwellings that must operate like business
(D) that, as dwellings, they must also operate like businesses
(E) to be a dwelling that must also operate as a business

First of all we need to find the role what 'as' or 'like' are doing here. Here we are not
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