The Peanut router is able to successfully ping the Serial 0 and Ethernet 0 interface of the Popcorn router, but a ping issued to the Ethernet 1 interface fails. Based on the above output, what are the potential causes of this problem?()
A. The Popcorn router is not forwarding RIP updates.
B. The Popcorn router did not include network 192.168.12.0 in its routing configuration.
C. The Ethernet1 interface of the Popcorn router is shutdown.
D. The clockrate is not present in the configuration of one of the routers.
E. The Serial interface of the Popcorn router is not operating.