Although the Supreme Court ruled as long ago as 1880 that Blacks could not be excluded outright from jury service, nearly a century of case-by-case adjudication has been necessary to develop and enforce the principle that all juries must be drawn from "a fair cross section of the community."
(A) has been necessary to develop and enforce the principle that all juries must be
[Event which started in the past and is still in progress, HAS been is correct construction]
(B) was necessary for developing and enforcing the principle of all juries being
[Being is almost always wrong, also, WAS indicates that even has concluded in the past]
(C) was to be necessary in developing and enforcing the principle of all juries to be
[Same as above]
(D) is necessary to develop and enforce the principle that all juries must be
[IS necessary, implies that the adjudication should happen in the future, it's a recommendation - Eliminate]
(E) will be necessary for developing and enforcing the principle of all juries being
[again future tense used - Eliminate]

armaan700+ wrote:Although the Supreme Court ruled as long ago as 1880 that Blacks could not be excluded outright from jury service, nearly a century of case-by-case adjudication has been necessary to develop and enforce the principle that all juries must be drawn from �a fair cross section of the community.�
(A) has been necessary to develop and enforce the principle that all juries must be
(B) was necessary for developing and enforcing the principle of all juries being
(C) was to be necessary in developing and enforcing the principle of all juries to be
(D) is necessary to develop and enforce the principle that all juries must be
(E) will be necessary for developing and enforcing the principle of all juries being

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