正解:B
The best tool to support the management of identified risk scenarios is maintaining a risk register, as it provides a comprehensive and structured record of the risk information and decisions, such as the risk description, rating, ownership, response, and status, and facilitates the communication and accountability of the risk management process and activities. The other options are not the best tools, as they are more related to the collection, measurement, or definition of the risk scenarios, respectively, rather than the management of the risk scenarios. References = CRISC Review Manual, 7th Edition, page 101.