Evaluating management's risk assessment and the internal audit activity’s risk assessment ensures that audit objectives align with organizational risks and priorities. This step is crucial for identifying high-risk areas and designing a focused audit approach.

Reviewing organizational structure, roles, and procedures (A) is important but does not directly establish engagement objectives.

Assessing process flow and control documents (C) is useful for control evaluation but not the primary planning step.

Reviewing meeting notes (D) may provide background information but is not the key step in establishing engagement objectives.