Refer to the exhibit.MTU has been configured on the underlying physical topology, and no MTU command has been configured on the tunnel interfaces.What happens when a 1500-byte IPv4 packet traverses the GRE tunnel from host X to host Y, assuming the DF bit is cleared?

A. The packet is discarded on router B B. The packet arrives on router C without fragmentation C. The packet arrives on router C fragmented D. The packet is discarded on router A