Which two are user definable OpenBoot parameters that can be set in the OpenBoot PROM?

.Which two are user definable OpenBoot parameters that can be set in the OpenBoot PROM?

A.
IP address for the system console

B.
host ID

C.
system date and time

D.
default boot device

E.
verbose hardware diagnostics

F.
powering off the hardware

Explanation:
The NVRAM chip stores user-definable system parameters, also referred to as
NVRAM variables or EEPROM parameters. The parameters allow administrators to control
variables such
as the default boot device and boot command. The NVRAM also contains writeable areas for
user-controlled diagnostics, macros, and device aliases. NVRAM is where the system
identification information is stored, such as the host ID, Ethernet address, and time-of-day (TOD)
clock.
Examples of NVRAM variables:
Variable Default Description
boot-device disk or net The device from which to start up.
diag-device net The diagnostic startup source device.
diag-file Empty string Arguments passed to the startup program in diagnostic mode.
diag-switch? false Whether to run in diagnostic mode
Reference: OpenBoot 4.x Command Reference Manual