Correct Answer: A, DTo analyze the effectiveness of the risk register, the risk manager should first check for risk classification and that probability and impact are identified, as these are fundamental components of risk analysis. Additionally, it is essential to ensure that risk origin, triggering event, and ownership are identified, as this information is crucial for understanding and managing the risks effectively. Checking meeting agendas and supporting documents, while important for communication, does not directly relate to the effectiveness of the risk register itself.