Regarding server RAID cards, which of the following statement is correct?

Regarding server RAID cards, which of the following statement is correct?
A . Server disks do not need to use array cards when doing RAID0
B . Write back mode, the data will be written directly to the disk, which is highly secure.
C . The array card cache needs to be used in conjunction with the cache battery, otherwise there is a risk of data loss after power failure.
D . Using FBWC, the data retention time does not exceed 72 hours. If the phone is dropped, the server recovery data must be flashed into the hard disk as soon as possible.

Answer: C