正解:B
According to the CRISC Review Manual, the most important time to involve business stakeholders in the development of bottom-up IT risk scenarios is when validating the risk scenarios, as they can provide valuable input on the relevance, completeness, and accuracy of the scenarios and their impact on the business objectives and processes2
1: CRISC Review Questions, Answers & Explanations Database, Question ID: 100001 2: CRISC Review Manual, 7th Edition, page 97