Minimum value for the IOPS on the production VMs

Question

You administer a Windows Server 2012 R2 Hyper-V host server that contains production and test virtual
machines (VMs). You plan to optimize the performance of the VMs.
The following settings must be applied to the VMs:
You must set a maximum value for the input/output operations per second (IOPS) on the test VMs.
You must set a minimum value for the IOPS on the production VMs.
You need to configure the environment. What should you do?

A. On all VMs, enable Network Quality of Service (QoS).
B. Create a shared virtual hard disk (VHD).
C. On the Hyper-V host server, enable Resource Metering.
D. On all VMs, enable Storage Quality of Service (QoS).

Correct Answer: D