Which two troubleshooting steps would you help to identify this problem?

Two virtual machines in different virtual networks are not able to communicate with each other.

Which two troubleshooting steps would you help to identify this problem? (Choose two.)
A . Ensure that the SDN gateway has the VRF or VRFs created for the two virtual networks.
B . Ensure that there is a default route in each virtual network’s VR
D . Ensure that there is a Contrail policy between the two virtual networks.
E . Run the tcpdump command on the virtual machine’s tap interface.

Answer: C,D