A network administrator wants to plan a major OS upgrade of the router, which acts as a default gateway in an organization. The administrator has documented the purpose of the change, scoped the change, and completed a comprehensive risk analysis. Which of the following is an important part of the change request process for which the administrator still must plan? 

Answer options:

A. Inform management regarding the anticipated amount of downtime
B. Document a backout plan to roll back changes to the router
C. Configure a redundant data path to eliminate downtime
D. Make the downtime window larger than actually anticipated

B