While the owner of a condominium apartment has free and clear title to the dwelling, owners of cooperative apartments have shares in a corporation that owns a building and leases apartments to them.
(A) While
the owner of a condominium apartment has free and clear title to the dwelling,
(B)
The owner of a condominium apartment has free and clear title to the dwelling, but
(C) Whereas
owners of condominium apartments have free and clear title to their dwellings,
(D)
An owner of a condominium apartment has free and clear title to the dwelling, whereas
(E) Condominium apartment
owners have a title to their dwelling that is free and clear, while
To maintain parallelism while comparing two subjects, it is essential to make sure they are similar.
In this case, the latter part of the sentence has the subject "
owners of cooperative apartments".
So, we want to make sure the first part of the sentence also has a plural comparable subject.
(A), (B), (D) are gone.
Between (C) and (E), (C) has even better parallel structure. Whereas "owners of" ... , "owners of" ...
Ans: (C)