Refer to the exhibit. You are implementing DMVPN Phase 3 in an existing network that uses DMVPN Phase1. You configure NHRP, but the creation of the spoke-to-spoke tunnel fails. Which action do you take to resolve the issue?
A. Remove the multicast flag from the NHRP configuration.
B. Configure the tunnel of the hub by using point-to-point tunnel mode.
C. Configure the tunnel of the spoke by using mGRE tunnel mode.
D. Remove NHRP redirects from the hub configuration.
