Which of the following is the reason this will ultimately not work?

A network technician is attempting to map a FQDN to an internal server at the address of 10.0.0.15 without NAT/PAT. Which of the following is the reason this will ultimately not work?

A.
This is a private address which cannot be seen by external users.

B.
The address does not have the appropriate subnet mask assigned.

C.
This is a public address which can only be seen by internal users.

D.
This is a private address which can only be seen by external users.