Notifying the audit manager allows for proper escalation of the situation within the auditing function. The audit manager can reassess the situation, determine the significance of the changes, and decide on the appropriate steps to take, which might involve re-evaluating the recommendations or discussing the matter with higher-level management or the audit committee.
While retesting the control (Option A) might be necessary depending on the nature of the recommendations and the changes in management, it's typically more appropriate to notify the audit manager first to ensure a coordinated response.