A network engineer must configure a DMVPN network so that a spoke establishes a direct path to another spoke if the two must send traffic to each other. A spoke must send traffic directly to the hub if required. Which configuration meets this requirement?

A. At the hub router:
interface tunnel10
ip nhrp nhs dynamic multipoint
ip nhrp nhs shortcut
tunnel mode gre multicast

On the spokes router:
interface tunnel10
ip nhrp nhs multicast dynamic
ip nhrp nhs redirect
tunnel mode gre multicast B. At the hub router:
interface tunnel10
ip nhrp map dynamic multipoint
ip nhrp redirect
tunnel mode gre multicast

On the spokes router:
interface tunnel10
ip nhrp map multicast dynamic
ip nhrp shortcut
tunnel mode gre multicast C. At the hub router:
interface tunnel10
ip nhrp nhs multicast dynamic
ip nhrp nhs shortcut
tunnel mode gre multipoint

On the spokes router:
interface tunnel10
ip nhrp nhs multicast dynamic
ip nhrp nhs redirect
tunnel mode gre multipoint D. At the hub router:
interface tunnel10
ip nhrp map multicast dynamic
ip nhrp redirect
tunnel mode gre multipoint

On the spokes router:
interface tunnel10
ip nhrp map multicast dynamic
ip nhrp shortcut
tunnel mode gre multipoint