.Your network is configured as shown in the following exhibit. When you trace traffic sourced from R3 destined for a LAN network off of R2 (not shown in the diagram), you see the traffic is being forwarded from R1 to ISP1 rather than to R2.
Which of the following issues could NOT be causing this behavior?
A. The network command has not been executed on the interface leading to the LAN off R2
B. The passive interface command has been issued on the Gi0/4 interface of R1
C. A default route exists on R1 that leads to ISP1
D. RIPv2 has not been enabled on R2