Given the following output from the metastat command:

# metastat d10
d10: Mirror
Submirror 0: d11
State: Okay
Submirror 1: d12
State: Resyncing
Resync in progress: 34 % done
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 69029766 blocks (32 GB)
d11: Submirror of d10
State: Okay
Size: 69029766 blocks (32 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c0t0d0s0 0 No Okay Yes
d12: Submirror of d10
State: Resyncing
Size: 69029766 blocks (32 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c0t1d0s0 0 No Okay Yes

What RAID level is the d10 volume?

A.
RAID 0

B.
RAID 1

C.
RAID 5

D.
RAID S