Which three statements about Cisco IOS XR CLI operations are true? (Choose three.)

A.
Cisco IOS XR uses a three-stage configuration method.

B.
Committed changes are persistent across reboots in Cisco IOS XR.

C.
The commit replace global configuration command replaces the contents of the running
configuration with the target configuration.

D.
The save global configuration command saves the contents of target configuration to the
running configuration.

E.
There is no concept of a startup-config in Cisco IOS XR.

F.
The clear global configuration command erases the entire current running configuration.

G.
The show running-config global configuration command displays the configuration that
occurs if the contents of the uncommitted changed (target configuration) are committed to
the running configuration.