A.S1(config)# interface fastethernet 0/1   S1(config - if)# ip helper - address 10.0.0.2
B.S1(config)# interface fastethernet 0/1   S1(config - if)# ip helper - address 20.0.0.1
C.R1(config)# interface fastethernet 0/0   R1(config - if)# ip help er - address 20.0.0.2R   1(config - if)# ip helper - address 20.0.0.3   R1(config - if)# ip helper - address 20.0.0.4   R1(config - if)# exit   R1(config)# interface fastethernet 0/1   R1(config - if)# ip helper - address 10.0.0.1
D.R1(config)# interface fastethernet 0/0   R1 (config - if)# ip helper - address 20.0.0.1   R2(config)# interface fastethernet 0/0   R2(config - if)# ip helper - address 20.0.0.1   R3(config)# interface fastethernet 0/0   R3(config - if)# ip helper - address 20.0.0.1   R4(config)# interface fastethernet 0/0   R4(config - if)# ip helper - address 20.0.0.1
E.S1(config)# interface fastethernet 0/1   S1(config - if)# ip helper - address 10.0.0.2   R2(config)# interface fastethernet 0/0   R2(config - if)# ip helper - address 20.0.0.1   R3(config)# interface fastethernet 0/0   R3(config - if) # ip helper - address 20.0.0.1   R4(config)# interface fastethernet 0/0   R4(config - if)# ip helper - address 20.0.0.1

A. If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.
B. A router does not have to be a member of a multicast group to recei ve multicast data.
C. A router must be a member of a multicast group to send to the group.
D. A router does not have to be a member of a multicast group to send to the group.
E. If a packet is sent to a multicast group address, all members of the multic ast group will receive it.
F. A router must be a member of a multicast group to receive multicast data.