Which two statements are true of root guard? (Choose two.)

Which two statements are true of root guard? (Choose two.)
A . Configure root guard to automatically change a designated port to a root port.
B . Configure uplinkfast on an enabled root guard interface to protect the root status of a switch.
C . Configure root guard to ensure that root guard enabled ports become designated ports.
D . Configure root guard to prevent an unauthorized switch from becoming the root switch.
E . Issue a no shutdown command to recover a port from the root-inconsistent state.

Answer: CD