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

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 X
D . The commit replace global configuration command replaces the contents of the running configuration with the target configuration.
E . The save global configuration command saves the contents of target configuration to the running configuration.
F . There is no concept of a startup-config in Cisco IOS X
H . The clear global configuration command erases the entire current running configuration.
. 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.

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Answer: B,C,E