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 has not yet been added to a vCenter Server.
B . The BIOS on the host does not have NX/XD enabled.
C . The ESXi host is running in evaluation mode.
D . The host requires a reboot before this feature is available.