A computer with an IP address of 172.18.40.5/12 is having trouble getting to an internal server at an IP address of 172.31.2.4. The default gateway of the computer is 172.16.1.1. What is the problem?

A. The IP address of the computer is wrong.
B. The IP address of the default gateway is wrong.
C. The IP address of the internal server is wrong.
D. The problem is not the networking configuration.

D. The computer had an IP address of 172.18.40.5/12 and it belongs to the 172.16.0.0/12 network, which has a range of 172.16.0.1 to 172.31.255.254. Therefore, the internal server is within the same network as the computer, and the default gateway has no effect on the problem. The conclusion is that the network is not the problem.