正解:B
A risk register is a tool that records and tracks the information about the identified risks, such as the risk description, category, owner, probability, impact, response strategy, status, and action plan. The most important consideration for effectively maintaining a risk register is to update it frequently, as the risk environment is dynamic and subject to change. By updating the risk register regularly, an organization can ensure that the risk information is current, accurate, and relevant, and that the risk responses are timely, appropriate, and effective. References = CRISC Review Manual, 7th Edition, page 99.