which of the following can be a reason why post-disaster baseline indicates server network performance considerably beneath pre-disaster values?

After a server restore, which of the following can be a reason why post-disaster baseline indicates server network performance considerably beneath pre-disaster values?

A.
Damaged cabling.

B.
Damaged hard drives.

C.
Damaged server components.

D.
All of the above.

Explanation:
When comparing pre-disaster and post-disaster baselines, and you are in a situation

where post-disaster baseline indicates server network performance considerably beneath pre-disaster values; you should check the actual baseline values to determine what the issue is. Either of the above mentioned factors can be the cause of server network performance being considerably beneath pre-disaster values after a server restore.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 443-444.