Which of the following is MOST likely preventing the RAID array from operating optimally?

An administrator notices the RAID 5 array is reporting a degraded health message. It contains three HDDs. A technician replaces the faulty HDD with a new one. but users then report access to the fileshare is not as fast as it used to be .

Which of the following is MOST likely preventing the RAID array from operating optimally?
A . The mirrored set is broken.
B . Write caching has been turned on.
C . The wrong drive was replaced.
D . The RAID array is rebuilding.

Answer: C