Based on the output shown in the exhibit, what does up signify?
A.
Prefixes are up if the interface on the local router toward the destination is functioning correctly.
B.
Prefixes are up if their unfragmented-packets value is flagged in the LSP.
C.
Prefixes are up if their LSP has not crossed an area boundary from level 2 to level 1.
D.
Prefixes are up if their unusable-path value is flagged in the LSP.
Explanation: