What is the first step in troubleshooting this problem?

A vSphere Administrator notices that a virtual machine is performing poorly, and upon investigation has observed the following:

What is the first step in troubleshooting this problem?
A . Shut down the virtual machine and double the amount of vCPU and RAM assigned.
B . Shut down the virtual machine and set the number of vCPU as high as possible.
C . Migrate the virtual machine to an ESXi host with more resources available.
D . Configure the virtual machine with CPU and Memory limits.

Answer: C