Choosing between 2 similar options in SC

[sangtanirohit]

1.
Like their male counterparts, women scientists are above average in terms of intelligence and creativity, but
unlike men of science, their female counterparts have had to work against the grain of occupational
stereotyping to enter a "man's world."
(A) their female counterparts have had to work
(B) their problem is working
(C) one thing they have had to do is work
(D) the handicap women of science have had is to work
(E) women of science have had to work

Query: Why not (A) and why (E).

2.
17. The success of the program to eradicate smallpox has stimulated experts to pursue what they had not
previously considered possible—better control, if not eradication, of the other infections such as measles and
yaws.
(A) what they had not previously considered possible—better control, if not eradication, of the other infections such
as
(B) what they had not previously considered a possibility—better control, if not eradication, of such infections like
(C) something they had not previously considered possible-better control, if not eradication, of such infections as
(D) something not considered a previous possibility—better control and perhaps eradication, of other infections
such as
(E) the possibility of what they had not previously considered—better control and possibly eradication of infections
like

Query : Why not (A) and why (C).

3.
40. According to one expert, the cause of genetic irregularities in many breeds of dog is not so much that dogs are
being bred for looks or to meet other narrow criteria as that the breeds have relatively few founding members.
(A) the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to
meet other narrow criteria
(B) the cause of genetic irregularities in many breeds of dog is not as much their being bred for looks or meeting
other narrow criteria as much
(C) it is not so much the cause of genetic irregularities in many breeds of dog that they are being bred for looks or
meeting other narrow criteria as much
(D) it is not so much that the cause of genetic irregularities in many breeds of dog is their being bred for looks or
meeting other narrow criteria so much
(E) it is not so much the cause of genetic irregularities in many breeds of dog to be bred for looks or to meet other
narrow criteria

Query: How to approach this question.it is difficult to understand the meaning.is this the problem that i m getting totally blank about how to approach.

[sangtanirohit]

Please somebody reply.
These questions are 2-3 yrs old.

[tim]

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