Users cannot access intranet resources when using the network extension function. Which of the following is not the possible cause of the failure?

Users cannot access intranet resources when using the network extension function. Which of the following is not the possible cause of the failure?
A . Has a virtual IP address been obtained on the virtual network card of the user PC?
B . The route between the firewall and the intranet server is unreachable.
C . User connection timed out.
D . The virtual IP address conflicts with the FW interface address, intranet server address, and DHCP address pool address.

Answer: C