Yes, it is acceptable for the work documents of the audit team leader to be reviewed by another auditor after reaching audit conclusions. This is part of the quality control and assurance processes within the audit to ensure the accuracy and reliability of the audit conclusions.
References: ISO 19011:2018, Guidelines for auditing management systems

The correct answer is the certification body, because ISO/IEC 17021-1 clearly assigns responsibility for establishing the audit scope and audit criteria to the certification body, not to the audit team or the auditee.
The certification body is responsible for managing the certification process, ensuring consistency, impartiality, and compliance with accreditation requirements.
The audit scope defines the boundaries of the certification audit, including organizational units, locations, activities, and processes to be audited. The audit criteria define the set of policies, procedures, and requirements against which conformity is assessed, such as ISO/IEC 27001 requirements, statutory obligations, and internal ISMS policies. While the audit team leader may plan how the audit will be conducted within the defined scope, they do not determine the scope itself.
Option A is incorrect because the audit team leader's role is to manage the audit execution, prepare the audit plan, and coordinate audit activities, not to establish the official scope or criteria. Option B is incorrect because although discussions with the auditee are necessary to understand the organization and confirm scope feasibility, the final authority remains with the certification body.
This separation of responsibility ensures independence and prevents organizations from unduly influencing the certification boundaries. Therefore, the certification body is the entity that establishes the audit scope and audit criteria.

Explanation:

* The auditee is the organization or part of it that is subject to the audit. The auditee could be internal or external to the audit client . The auditee should cooperate with the audit team and provide them with access to relevant information, documents, records, personnel, and facilities .
* The audit client is the organization or person that requests an audit. The audit client could be internal or external to the auditee . The audit client should define the audit objectives, scope, criteria, and programme, and appoint the audit team leader .
* The technical expert is a person who provides specific knowledge or expertise relating to the organization, activity, process, product, service, or discipline to be audited. The technical expert could be internal or external to the audit team . The technical expert should support the audit team in collecting and evaluating audit evidence, but should not act as an auditor .
* The observer is a person who accompanies the audit team but does not act as an auditor. The observer could be internal or external to the audit team . The observer should observe the audit activities without interfering or influencing them, unless agreed otherwise by the audit team leader and the auditee .
References :=
* [ISO 19011:2022 Guidelines for auditing management systems]
* [ISO/IEC 17021-1:2022 Conformity assessment - Requirements for bodies providing audit and certification of management systems - Part 1: Requirements]

The correct statement which defines the content of the scope of the ISMS is that the ISMS scope should take any information security issues that have occurred and any interested parties' requirements into consideration.
According to ISO/IEC 27001:2022, the scope of the ISMS should be determined by considering the internal and external issues, the requirements and expectations of interested parties, the interfaces and dependencies between the organisation and other parties, and the information security risks. The scope of the ISMS should also be aligned with the strategic direction of the organisation and be appropriate to its purpose and context.
The scope of the ISMS should not be limited by the government's recommendation, nor exclude external service providers, nor be based on a single department or function, unless these are justified by the risk assessment and the needs and expectations of interested parties. References: = ISO/IEC 27001:2022, clause
4.3; PECB Candidate Handbook ISO 27001 Lead Auditor, page 15; ISO 27001 scope statement | How to set the scope of your ISMS - Advisera.

Explanation (Audit & analytics perspective)
* Data mining focuses on discovering patterns, anomalies, and relationships in historical datasets.
* Identifying repeated transactions just below approval thresholds is a classic data mining technique.
* Predictive analytics focuses on forecasting future outcomes, not detecting historical anomalies.
Data management is concerned with storage and governance, not analysis.