An administrator receives a call indicating users reported extremely slow access to virtual machines the previous evening. Access to virtual machines performs as expected as checked by the administrator. Over the course of several days, the administrator continues to receive calls about the issue, which appears to occur at intermittent times each evening.
Which step can be taken to collect information about the issue?

A.
Create a condition alarm to alert when Datastore Disk Usage (*) exceeds 70%

B.
Collect esxtop performance data in batch mode and analyze total number of I/O operations (CMDS/s) metrics

C.
Create an event alarm to alert when a storage device is disconnected

D.
Collect esxtop performance data in batch mode and analyze average device latency (DAVG/cm-d) metrics.

Explanation:
Prepking uses the words "resxtop" which is esxtop for ESXi.

I didn’t find oficial docs to that question but using logic, I choose option D.

A – Used for space use.
B – Depend on your Storage Array you can obtain more or less I/O operations, its good to look this but only for help.
C – Storage is not disconnected is high used, that answer didn’t work.