Once the police made public the details of the hacking of the university computer, the chemistry professor, announcing that since some of the students had clearly cheated on the exam, all would have to retake it.
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Aprofessor, announcing that since some of the students had clearly cheated on the exam,
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Bprofessor, announcing that some of the students had clearly cheated on the exam, and
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Cprofessor announced that some of the students, having clearly cheated on the exam,
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Dprofessor announced that since some of the students had clearly cheated on the exam,
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Eprofessor, announcing that some of the students, having clearly cheated on the exam,
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正确答案: D