The correct answer is An assessor who has a sibling employed in the conglomerate's technology team but the sibling does not work on the information system or its security controls.

This assessor is the most likely to remain independent because the familial relationship does not create a direct reporting line or financial interest in the system under review and the sibling has no role in the information system or its security controls. That separation of duties and lack of influence over the target system reduce the risk of bias and conflict of interest and support objective assessment.

An assessor who is married to an executive at one of the conglomerate's major rivals in the sector is incorrect because that close spousal relationship to a competitor can create strong bias or the appearance of bias. The assessor might have divided loyalties or access to competitive insights that affect impartial judgment, and that relationship therefore undermines independence.

An assessor who completed a consulting engagement for a subsidiary last quarter where they reviewed controls and recommended improvements is incorrect because recent consulting creates a self review threat. The assessor would be evaluating work they influenced recently and that undermines objectivity, especially when the engagement was within the last few months.

An assessor who served as an internal auditor for the conglomerate four years ago and audited the same information system before leaving on good terms is incorrect because prior employment and prior audit involvement create familiarity and potential bias. Even though the work was done on good terms and it was several years ago, previous responsibility for auditing the same system can impair independence or at least raise concerns about objectivity.

Full AWS Practitioner Certification Question