The correct option is To inform enterprise risk management by identifying possible adverse impacts to mission objectives, assets, personnel and national interests.

The To inform enterprise risk management by identifying possible adverse impacts to mission objectives, assets, personnel and national interests option is correct because classifying an information system and assigning impact levels directly links the system to mission outcomes and organizational priorities. Classification produces low moderate or high impact ratings that help enterprise risk management understand where failures would cause the most serious harm to mission objectives assets people or national interests. That information then drives risk acceptance decisions funding priorities and the overall scope of the security assessment.

To specify exact control settings and parameters for security and privacy plans is incorrect because classification and impact levels define the potential consequences of compromise rather than the precise control values. Exact control settings are chosen later when controls are selected tailored and implemented based on risk and technical context.

To establish baseline control families and tailor those baselines for the information system is incorrect because baselines and tailoring are downstream activities that use the impact level as input. Classification informs which baseline to apply but the act of establishing and tailoring controls occurs during system design and implementation not during initial classification.

To validate that implemented controls are functioning as intended is incorrect because validation belongs to the assessment and testing phase of the security lifecycle. Classification occurs earlier to determine the assessment scope and the level of rigor required rather than to perform the validation itself.

Full AWS Practitioner Certification Question