Which of the following elements of existing and new hard drives should be the same, to assist in ensuring hard drive compatibility? Choose all correct options.

A.
Make

B.
Model

C.
Size

D.
All of the above

Explanation:
Before installing any new hard drives, you must ensure that the make, model, and size of the existing hard drives and new hard drive(s) are compatible. The easiest way to ensure compatibility is to verify that each hard drive’s make, model, and size is the same.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 385-386.