Refer to the exhibit. Which option represents the minimal configuration that allows inbound traffic from the 172.16.1.0/24 network to successfully enter router R, while also limiting spoofed 10.0.0.0/8 hosts that could enter router R?
A. (config)#ip cef
(config)#interface fa0/0
(config-if)#ip verify unicast source reachable-via rx allow-default
B. (config)#ip cef
(config)#interface fa0/0
(config-if)#ip verify unicast source reachable-via rx
C. (config)#no ip cef
(config)#interface fa0/0
(config-if)#ip verify unicast source reachable-via rx
D. (config)#interface fa0/0
(config-if)#ip verify unicast source reachable-via any
