Refer to the exhibits. Which configuration allows spoke-to-spoke communication using loopback as a tunnel source? 

Answer options:

A. Configure crypto isakmp key cisco address 0.0.0.0 on the hub
B. Configure crypto isakmp key cisco address 200.1.0.0 255.255.0.0 on the hub
C. Configure crypto isakmp key cisco address 200.1.0.0 255.255.0.0 on the spokes
D. Configure crypto isakmp key cisco address 0.0.0.0 on the spokes

D