According to the International Standards for the Professional Practice of Internal Auditing, the final audit report should be distributed to those responsible for the functions being audited (audit client management) and to those who oversee or are accountable for the audit function (executive management). Additionally, the chief audit executive (CAE) can approve distribution to other relevant stakeholders as necessary. This ensures that all relevant parties are informed and can take appropriate action based on the audit findings. References:
* IIA Standards - 2410: Criteria for Communicating
* IIA Practice Guide - Communication with the Board

The CAE has a responsibility to communicate significant risks to the board, particularly when the residual risk exceeds the organization's risk appetite. By communicating with the board, the CAE ensures that the highest level of governance is aware of the risk and can make informed decisions about how to address it.
Ignoring the risk, assuming responsibility without authority, or only ensuring senior management's acknowledgment without further action would be insufficient and not in line with the CAE's duties.
References:
* The Institute of Internal Auditors (IIA) Standards
* Internal Audit's Role in Risk Management

A finding can be removed from the final audit report if management provides additional information that accurately contradicts the initial findings. This indicates that the initial findings may have been based on incomplete or incorrect information. Disagreements (Option A) or beliefs about the insignificance (Option D) of the finding do not justify removal unless they are supported by new, contradicting evidence. Even if corrective actions are already taken (Option B), the original finding may still be relevant for documentation and historical context.
IIA Standard 2410: Criteria for Communicating.
IIA Practice Guide on Communicating Results.

While aligning organizational activities to internal audit activities and measuring according to approved IAA performance measures is important, it adds the least direct value to achieving the IAA's objectives compared to the other strategies. Establishing periodic reviews, using engagement results to guide future activities, and ensuring the format and frequency of IAA reporting align with the organization's governance structure are all more directly impactful strategies. References: = IIA Standard 1300 - Quality Assurance and Improvement Program and IIA Standard 1320 - Reporting on the Quality Assurance and Improvement Program.

When selecting an external service provider, the CAE must ensure that the provider possesses the necessary knowledge, skills, and competencies relevant to the specific type of work being reviewed. This is best demonstrated by the provider's experience in the relevant field (Option D). The other options, such as financial interest (Option A), prior relationships (Option B), and compensation (Option C), are considerations for assessing potential conflicts of interest or independence but are not primary criteria for evaluating technical competency.
IIA Standard 1210: Proficiency.
IIA Practice Guide on External Service Provider Arrangements.