Which of the following MOST likely needs to be upgraded?

A systems administrator is troubleshooting performance issues with a Windows VDI environment. Users have reported that VDI performance has been slow since the images were upgraded from Windows 7 to Windows 10.

This VDI environment is used to run simple tasks, such as Microsoft Office.

The administrator investigates the virtual machines and finds the following settings:

✑ 4 vCPU

✑ 16GB RAM

✑ 10Gb networking

✑ 256MB frame buffer

Which of the following MOST likely needs to be upgraded?
A . vRAM
B . vCPU
C . vGPU
D . vNIC