1. 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

2. Although films about the American West depict coyotes as solitary animals howling mournfully on the tops of distant hills, in reality these gregarious creatures live in stable groups that occupy the same territory for long periods.
(A) films about the American West depict coyotes as solitary animals howling mournfully on the tops of distant hills
(B) in films about the American West coyotes are depicted to be solitary animals that howl mournfully on the tops of distant hills
(C) coyotes are depicted as solitary animals howling mournfully on the tops of distant hills in films about the American West
(D) films about the American West depict coyotes as if they were solitary, mournfully howling animals on the tops of distant hills.
(E) films about the American West depict coyotes to be solitary and mournfully howling animals on the tops of distant hills

3. Even though its per capita food supply hardly increased during two decades, stringent rationing and planned distribution have allowed the People’s Republic of China to ensure nutritional levels of 2,000 calories per person per day for its population.
(A) Even though its per capita food supply hardly increased during
(B) Even though its per capita food supply has hardly increased in
(C) Despite its per capita food supply hardly increasing over
(D) Despite there being hardly any increase in its per capita food supply during
(E) Although there is hardly any increase in per capita food supply for

1) compare owners to owners only (C),(E) do that.C appears much better of the two.
2)(A) - active so (B) (C),(E) would be out.(D) says as if they were not correct.
3)during has to be used for a period say for the last two decades.Cannot be used directly as in during two decades.
(B)
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A well-balanced person is one who has a drink in each of his hands.

1> C ... A, B and D out for non parallel (singular - owner). C is clearly preferred over E for owners of x instead of x's owners.

2> A ... B and C are passive. E incorrect idiom - depicted to be. D 'as if' is unwarranted.

3> B ... E out 'for' at the end. D is wordy. A uses wrong tense (see the other part of the sentence) C provides a phrase. We need a clause.