A Systems Administrator Sees a Production Server Is Missing a Service

Multiple Choice

A systems administrator sees a production server is missing a service pack and installs it during the day without notifying anyone. Later that day, users begin reporting issues accessing an application installed on the server. Upon investigation, it is discovered that the application will not start properly. Adhering to which of the following processes would have BEST helped avoid this outage?

A) Service level agreement
B) Business continuity plan
C) Business impact analysis
D) Change management policies