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Ankur87
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The scientist knew for a long time beyond the shadow of a doubt that she discovered the double helix.
A) The scientist knew for a long time beyond the shadow of a doubt
B) For a long time, the scientist had known beyond the shadow of a doubt
C) For a long time, the scientist had known with great certainty
D) For a long time, the scientist knew beyond the shadow of a doubt
E) The scientist had known for a long time beyond the shadow of a doubt
[spoiler]IMO : B
OA: C[/spoiler]
A) The scientist knew for a long time beyond the shadow of a doubt
B) For a long time, the scientist had known beyond the shadow of a doubt
C) For a long time, the scientist had known with great certainty
D) For a long time, the scientist knew beyond the shadow of a doubt
E) The scientist had known for a long time beyond the shadow of a doubt
[spoiler]IMO : B
OA: C[/spoiler]
