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Which of the following statements is(are) correct regarding the deterrence of fraud?
I. The primary means of deterring fraud is through an effective control system initiated by senior management.
II. Internal auditors are responsible for assisting in the deterrence of fraud by examining and evaluating the adequacy of the internal control system.
III. Internal auditors should determine whether communication channels provide management with adequate and reliable information regarding the effectiveness of the control system and the occurrence of unusual transactions.