An internal auditor previously provided consulting advice on designing controls for a new payroll system. Later she is assigned an assurance engagement on the same system. Which is true?
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A
Assurance on a previously consulted area is always prohibited
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B
It may be acceptable if objectivity is not impaired and the impairment risk is managed and disclosed if needed
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C
It is acceptable only if the external auditor approves
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D
Consulting work automatically creates a conflict of interest