A customer with 30 branch offices requires dynamic IGP routing protocols, IP multicast, and non-IP protocol support. Which solution satisfies these requirements?
A. VTI
B. IPsec direct encapsulation
C. DMVPN hub-and-spoke
D. p2p GRE
E. DMVPN spoke-to-spoke
it is D because p2p GRE Supports non-IP Protocols and DMVPN does not