A Company Is in the Middle of an Operating System

Multiple Choice

A company is in the middle of an operating system update to Windows 10 from Windows XP, Windows 7, and Windows 8.x. The diverse nature of the update has made it imperative that the help desk techs have the ability to run several concurrent VMs. A few of the techs are experiencing frequent and extended periods of 100% CPU usage on their computers, and these spikes are limiting their ability to assist users in a timely manner.
Which of the following is most likely causing this behavior?

A) Insufficient number of physical processor cores.
B) Disabled hardware-assisted virtualization.
C) Dynamic allocation of RAM is disabled.
D) One or more VHDs are running out of free disk space.