What does Storage DRS do to determine if a particular disk device is overburdened?

A.
Monitors disk I/O latency on the shared storage devices.
B.
Takes a count of virtual machines on the storage device.
C.
Powers down the storage device.
D.
Reads the data on the storage devices.
A
0
0
A is correct
0
0
A as stated on Data Center Virtualization Fundamentals:
Storage DRS section:
“Storage DRS measures disk I/O latency to determine if a particular device is overburned”
0
0
A
0
0