What does this indicate and what could be checked next?

A Windows virtual machine is experiencing poor application performance. The suspected issue is
a lack of available memory. Windows Task Manager reports that 30% of the memory within the
VM is not currently being utilized.

What does this indicate and what could be checked next?

A.
Windows Task Manager is not reading actual memory usage in the VM. Windows System
Monitor should be used to get a precise reading on memory usage.

B.
The application problems are definitely due to a non-memory related problem. CPU affinity
settings should be checked for this VM.

C.
The VM has memory available, however it may not actually have physical memory available.
VMkernel swap activity on the ESXi host should be checked next.

D.
The application problems are definitely due to a non-memory related problem. CPU utilization
should be checked next using Windows Task Manager.

Explanation:
The poor application performance due to suspected lack of available memory suggests paging is the cause of the issue. If Windows Task Manager shows 30% of the memory within the VM is not currently being used, then paging must be occurring within the VM host. Therefore poor application performance should now be checked.