Immediately after installing ESXi, an administrator observes that the Configure Lockdown
Mode option is grayed out in the Direct Console User Interface (DCUI). What is the most
likely explanation?

A.
The host requires a reboot before this feature is available.

B.
The host has not yet been added to a vCenter Server.

C.
The BIOS on the host does not have NX/XD enabled.

D.
The ESXi host is running in evaluation mode.