A gold user and a common user access a carrier network through the MPLS Layer 3 VPN. On the entire MPLS network (from PE to PE), the carrier performs queue scheduling for the gold user by trusting…

A gold user and a common user access a carrier network through the MPLS Layer 3 VPN. On the entire MPLS network (from PE to PE), the carrier performs queue scheduling for the gold user by trusting the IP priority of the user and for the common user by using the carrier's own operation policy. Which of the following is the tunnel mode of the MPLS differentiated service for the gold user and common user, respectively?