BGP selects the active route based on an ordered list of attributes. The correct order is:
Weight (Cisco proprietary, not listed in the options)
Local Preference
Network (route) originated from the BGP router itself
Shortest AS Path
Lowest Origin Type
Lowest MED
eBGP over iBGP paths
Closest IGP Neighbor
Lowest Router ID
The next hop is checked for reachability but is not part of the BGP decision process for selecting the best path.

The router identifier is used by BGP and OSPF to identify the routing device from which a packet originated. The router identifier usually is the IP address of the local routing device. If you do not configure a router identifier, the IP address of the first interface to come online is used. This is usually the loopback interface. Otherwise, the first hardware interface with an IP address is used In OSPF, if a router ID is not manually configured, Junos OS will automatically select the router ID based on the highest IP address of any of the router's loopback interfaces. If no loopback interface exists, the highest IP address of any active interface will be used. Therefore, answer C is correct.

A Level 1/2 router maintains separate link-state databases for Level 1 and Level 2, treating them as two distinct topologies rather than merging them into a single topology.
A Level 1 router only participates in the Level 1 area and therefore only learns the topology information contained within the Level 1 link-state database.

IPv6 link-local addresses are automatically generated for each interface and have a prefix of fe80::/10. The interface's MAC address is typically used as part of the process to create the Interface Identifier (IID) in the link-local address, following the EUI-64 format.

RSVP-TE is used to signal MPLS traffic-engineered LSPs and supports explicit path configuration. This allows you to define the exact sequence of core hops the LSP must follow between PE routers, ensuring traffic traverses the desired path rather than simply following the IGP shortest path.