Which major J-Web menu should you use to upgrade the JUNOS software on the router？（）

A.They are scalable.
B.They are Dijkstra based.
C.They share network layer reachability information among neighbors.
D.They automate next hop decisions.
E.They are tolerant of configuration errors.

A.packet forwarding
B.queuing functions
C.routing protocol control
D.JUNOS software operation

A.UNIX shell
B.user level CLI
C.configuration mode
D.operational mode