There is a problem on a SPARC-based system that has several permanent, customized device aliases. The system’s use of these aliases needs to be temporarily disabled, so that when the problem is cleared, they can be enabled without having to redefine them.
Which sequence of OBP commands temporarily disables the customized device aliases defined on the system?

A.
setenv use-nvramrc?=false
reset

B.
use-nvramrc=false
reset

C.
setenv use-nvramrc? false
reset

D.
use-nvramrc?=false
reset