Refer to the exhibit. MPLS has been enabled on router PE11. Which of these statements is correct regarding the output display shown in the exhibit? （）

• A、CEF switching is not needed for MPLS operation.
• B、CEF switching is only needed to forward labeled packets.
• C、CEF switching is needed on both ingress and egress interfaces on which MPLS is enabled.
• D、Interface-level CEF switching is needed only on egress interfaces that are sending IP packets on which the egress LSR performs the label imposition process.
• E、Interface-level CEF switching is needed only on ingress interfaces that are receiving IP packets on which the ingress LSR performs the label imposition process.