226 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（A）
(E) to be a dwelling that must also operate as a business
我对这题还是不太理解。
1）能不能讨论一下各选项错的原因！
2）有关于选项中的like和as我觉得解释为象。。。and 作为。。。 都通顺的，这可怎么办？
急急得求证：） | 
