正解:B
The most appropriate time to conduct a disaster recovery test would be after the business continuity plan (BCP) has been updated, as it ensures that the disaster recovery plan (DRP) is aligned with the current business requirements, objectives, and priorities. The BCP should be updated regularly to reflect any changes in the business environment, such as new threats, risks, processes, technologies, or regulations. The disaster recovery test should validate the effectiveness and efficiency of the DRP, as well as identify any gaps, issues, or improvement opportunities123. Reference =
1: CISM Review Manual 15th Edition, page 2114
2: CISM Practice Quiz, question 1042
3: Business Continuity Planning and Disaster Recovery Testing, section "Testing the Plan"