What are two valid reasons to upgrade Cisco IOS XR Software? (Choose two.)

A.
A few software bugs that have no service impact.

B.
There are no rules for this device in the policy table.

C.
A new line card needs to be added, and it is not supported in the current installed release.

D.
Current bandwidth utilization is poor, and bandwidth efficiency needs to be increased.

E.
Already running BGP, and need a specific BGP feature that is not supported in current installed release.