An engineer upgraded a router to an incorrect version of the Junos OS and performed the system snapshot function.
Which two actions would return the system to the original version? (Choose two.)
A . Downgrade to the correct Junos OS version and perform a system snapshot.
B . Rollback the Junos OS version and perform a system snapshot.
C . Reboot the router using the secondary media and perform a system snapshot.
D . Reboot the router using the primary media and perform a system snapshot.
Answer: A,C