According to the International Standards for the Professional Practice of Internal Auditing, when significant risk exposures remain unaddressed after a follow-up engagement, the CAE must first discuss the matter with the appropriate level of management responsible for the area. The purpose is to determine whether there is a valid reason for not implementing the recommended corrective actions, to clarify management's perspective, and to encourage timely resolution.
If management still refuses to act and the risk remains high, the CAE must then escalate the issue to senior management and, if necessary, to the board. Immediate escalation to the board without first discussing with management is inappropriate, as it bypasses the chain of accountability. Reporting directly to external auditors is also not the responsibility of the CAE unless specifically mandated by regulation or law.
Therefore, the correct initial step is to discuss the issue with management responsible for the risk area (Option B).
Reference:IIA Standards - Standard 2500: Monitoring Progress; Implementation Guide 2500 - Monitoring Progress.