A service provider is in the process of providing Layer 2 and Layer 3 VPN services through a MPLS LDP-enabled backbone. With load increasing in the service provider domain, scalability become the most important. Based on the local label allocation filtering feature, which is the lower subset of prefixes must be selected to meet these requirements?
A. RR, P, and PE loopbacks that are used as BGP next hop
B. all/32 prefixes advertised in the IGP
C. P and PE loopbacks that are used as BGP next hop
D. CE loopbacks only that are used as BGP next hop
