Which statement is true about the network between Certkiller A and Certkiller B?

You work as a administrator at Domain.com. Virtual machine VM) Certkiller A is connected to virtual switch A, and VM Certkiller B is connected to virtual switch B. Which statement is true about the network between Certkiller A and Certkiller B?

A.
Traffic between VM Certkiller A and VM Certkiller B flows through the physical NIC.

B.
Traffic between VM Certkiller A and VM Certkiller B stays within ESX Server.

C.
VM Certkiller A can communicate with VM Certkiller B if they have same security policies.

D.
VM Certkiller A can communicate with VM Certkiller B if they have same port group policies.