请教XDF语法

请教新东方语法几题， 谢谢。

1,Although it claims to delve into political issues, television can be superficial such as when each of the three major networks broadcast exactly the same statement from a political candidate.

(A)   Superficial such as when each of the three major networks

(B)   Superficial, as can sometimes occur if all of the three major networks

(C)   Superficial if the three major networks all

(D)   Superficial whenever each of the three major networks

(E)    Superficial, as when the three major networks each

(Answer E, can someone tell me why please?)

2, Although it was expected that workers under forty would show hostility to the plan, the research report indicates that both younger and the older people approve of governmental appropriations for Social Security.

(A)   Younger and the older people

(B)   Younger people and the older

(C)   The younger and the older people

(D)   Younger and older people

(E)    People who are younger and those who are older

(Answer D)

4, One of Ronald Reagan’s first acts as President was to rescind President Carter’s directive that any chemical banned on  medical grounds in the United States be prohibited from sale to other countries.

(A)   That any chemical banned on medical grounds in the United States be prohibited from sale to other countries

(B)   that any chemical be prohibited from sale to other countries that was banned on medical grounds in the United States

(C)   prohibiting the sale to other countries of any chemical banned on medical grounds in the United States

(D)   prohibiting that any chemical banned on medical grounds in the United States is sold to other countries

(E)    that any chemical banned in the United States on medical grounds ins prohibited from being sold to other countries

(Answer C, can I please ask, isn’t A better than C)

5, The commission acknowledged that no amount of money or staff members can ensure that safety of people who live in the vicinity of a nuclear plant, but it approved the installation because it believed that all reasonable precautions had been taken.

(A)   No amount of money or staff members

(B)   Neither vast amounts of money nor staff members

(C)   Neither vast amounts of money nor numbers of staff members

(D)   Neither vast amounts of money nor a large staff

(E)    No matter how large the staff or how vast the amount of money

(Answer is D, but does ‘a large staff’ make sense? Why can not be B? )

有人解释一下吗？