Refer to the exhibit. The DHCP client is unable to receive a DHCP address from the DHCP server.
Consider the following output:
hostname RouterB
!
interface fastethernet 0/0
ip address 172.31.1.1 255.255.255.0
interface serial 0/0
ip address 10.1.1.1 255.255.255.252

!
ip route 172.16.1.0 255.255.255.0 10.1.1.2
Which configuration is required on the Router B fastethernet 0/0 port in order to allow the DHCP
client to successfully receive an IP address from the DHCP server?

A.
RouterB(config-if)# ip helper-address 172.16.1.2

B.
RouterB(config-if)# ip helper-address 172.16.1.1

C.
RouterB(config-if)# ip helper-address 172.31.1.1

D.
RouterB(config-if)# ip helper-address 255.255.255.255