Comprehensive and Detailed Explanation From Exact Extract:
According to Implementation Guidance on Independence and Objectivity (Standard 1110), internal auditors may serve in advisory roles as long as they avoid assuming management responsibility. If the CAE assigns a representative to a sensitive steering committee, the choice should be based on relevant expertise and experience to add value without compromising independence. Option D is correct: selecting an auditor with prior experience in mergers or due diligence ensures competence while maintaining objectivity.
Options A and B confuse the role of the auditor with gathering intelligence or strategy promotion. Option C is incorrect, as participation does not require only the CAE.

Comprehensive and Detailed Explanation From Exact Extract:
According to Standard 2340 - Engagement Supervision, engagement work must be properly supervised to ensure that objectives are achieved, quality is maintained, and staff are developed. Supervision is not limited to approving the engagement program at the beginning; it requires ongoing review of workpapers and fieldwork throughout the engagement. This includes providing timely feedback, asking clarifying questions, and ensuring consistency and sufficiency of evidence.
In this case, the supervisor only reviewed the work program at approval and after completion, which is inadequate. The required improvement is regular, ongoing review of workpapers and guidance throughout the engagement. This directly aligns with Standard 2340's requirement for continuous supervision rather than only final review.

According to IIA guidance, the most important objectives for ensuring the appropriate completion of an engagement include coordinating audit team members to ensure efficient execution, confirming that engagement workpapers properly support the observations, recommendations, and conclusions, and ensuring that engagement objectives are reviewed for satisfactory achievement and are documented properly. These objectives focus on the quality and thoroughness of the audit work, which are critical for the engagement's success. References:
* IIA Standards - 2300: Performing the Engagement
* IIA Practice Guide - Audit Documentation

Section: Volume C

In internal auditing, evidence must meet certain criteria to support conclusions and recommendations. According to IIA guidance, evidence should be sufficient, reliable, relevant, and useful. In this scenario, the internal auditor concludes that additional staff are needed to fully utilize a fraud surveillance system based on an employee's statement. However, the conclusion may lack sufficient evidence to support it.
Detailed Explanation:
IIA Standard 2310 - Identifying Information:
This standard requires that internal auditors identify sufficient, reliable, relevant, and useful information to achieve the engagement's objectives. "Sufficiency" refers to the quantity of evidence necessary to convince an informed person of the validity of the auditor's findings and recommendations.
Sufficiency of Evidence:
The auditor's conclusion about the need for additional staff is based on a single employee's remark, which is not sufficient evidence. The auditor would need to gather more evidence, such as analyzing workload data, reviewing system logs, or assessing staff capacity, to support the conclusion fully.
IIA Practice Advisory 2310-1:
This advisory emphasizes the need for auditors to obtain enough factual evidence to support their findings. Relying solely on anecdotal evidence from one employee does not meet the standard for sufficiency.
Why Not Other Options?
Option B (Reliability): Reliability refers to the accuracy and credibility of the evidence. The employee's statement might be credible but still insufficient in quantity.
Option C (Relevancy): The employee's comment is relevant to the issue, but relevancy alone does not make the evidence sufficient.
Option D (Usefulness): The information could be useful, but it lacks the sufficiency needed to justify the auditor's conclusion.