Consider the overall requirements for the multicast-based applications. What is the optimal approach for an overall multicast routing design?
A. xtend the EDUnet multicast domain to the ASE infrastructure with necessary multicast route filtering and keep the design secure and simple
B. eep the ASE infrastructure as a separate multicast domain, and use MP-BGP toward the EDUnet infrastructure to exchange the multicast information
C. eep the ASE infrastructure as a separate multicast domain, and use MSDP between multicast RPs at both ends to exchange multicast information
D. xtend the EDUnet multicast domain to ASE, configure one device in ASE as the rendezvous point, and use MSDP between ASE and EDUnet for redundancy
E. eep the ASE infrastructure as a separate multicast domain, and use MSDP between the extranet routers and the EDUnet infrastructure to exchange multicast information