A company has just installed an update to their vSphere environment that requires VMware tools to be updated on all of their guests. The company has the SMC Virtual Appliance installed in their environment and it is functioning properly.
You notice the status for the VMware tools on the SMC virtual machine is out of date. When you attempt to upgrade the VMware tools on the SMC Virtual Appliance, you receive an error and the update fails.
What is most likely the cause?

A.
SMC Virtual Appliance does not allow root access

B.
SMC Virtual Appliance was installed on a local disk

C.
SMC Virtual Appliance requires a reboot after the upgrade

D.
SMC Virtual Appliance is not powered on