[E21] Students are forbidden to bring their phones into the exam room. There is no exception whatsoever

Question:

Students are forbidden to bring their phones into the exam room. There is no exception whatsoever

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  A.
  Under no circumstances are students prohibited from bringing their phones into the exam room.
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  B.
  On no account are students permitted to bring their phones into the exam room
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  C.
  At no time were students permitted to bring their phones into the exam room.
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  D.
  In no way are students prohibited from bringing their phones into the exam room.