Explanation
The correct action to take in this situation is to raise it as an opportunity for improvement. This is because the auditee is not violating any requirement of the standard, but rather using outdated terminology that does not reflect the current version of the standard. An opportunity for improvement is a suggestion for enhancing the performance or effectiveness of the ISMS1. It is not a nonconformity, which is a failure to fulfil a requirement2. Therefore, option B is incorrect. Option A is also incorrect, because noting the issue in the audit report without raising it as an opportunity for improvement would not provide any value or feedback to the auditee. Option D is also incorrect, because bringing the matter up at the closing meeting without documenting it as an opportunity for improvement would not ensure that the auditee takes any action to address it.
References: 1: ISMS Auditing Guideline - ISO27000, page 11; 2: ISO/IEC 27000:2022, 3.28; : ISMS Auditing Guideline - ISO27000; : ISO/IEC 27000:2022