Which pseudo-file contains information on the status of software RAID devices?

Which pseudo-file contains information on the status of software RAID devices?

A.
/proc/raidstat

B.
/proc/mdstatus

C.
/proc/raidstatus

D.
/proc/mdstat

E.
/proc/raid/status

Explanation:
From the man pages:
/proc/mdstat If you’re using the /proc filesystem, /proc/mdstat lists all active md devices with
information about them. mdadm uses this to find arrays when –scan is given in Misc mode, and to
monitor array reconstruction on Monitor mode.