In which of the following circumstances would you need to perform a BIOS upgrade to ensure that a new hard drive installation is supported?

A.
When the current BIOS does not support the hard drive type that you want to add.

B.
When the current BIOS does not support the hard drive size that you want to add.

C.
When you add new, faster processors.

D.
All of the above

Explanation:
You need to perform a BIOS upgrade when your existing BIOS does not support the hard

drive type and size that you want to install. Also, when adding processors, you should perform a BIOS upgrade when new, faster processors are going to be added. In fact, the most practical time to perform an upgrade of the server’s BIOS is when you perform a processor upgrade References: Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 380-381, 385-386.