Which of the following can be used when installing the OS without a boot disk？（）

A. Identify which systems are the most critical and bring them up by level of importance.
B. Retrieve the latest backup tapes for immediate system restore using the GFS rotation.
C. Identify the least critical systems and then power those systems on first.
D. Determine the cause of the power outage and install UPS systems to prevent its reoccurrence.

A.23
B.902
C.1677
D.3389

A.Company policy requirements
B.Local legal requirements
C.Storage requirements
D.Disposal requirements