Why do interprovider option B VPNs scale better than interprovider option A VPNs?
A. The ASBRs in interprovider option B VPNs do not need per-VPN VRF tables.
B. The ASBRs in interprovider option A VPNs do not need per-VPN VRF tables.
C. The ASBRs in interprovider option A VPNs only carry internal routes.
D. The ASBRs in interprovider option B VPNs only carry internal routes.