In the configuration of NAT,what does the keyword overload signify?

A.
When bandwidth is insufficient, some hosts will not be allowed to access network
translation.

B.
The pool of IP addresses has been exhausted.

C.
Multiple internal hosts will use one IP address to access external network resources.

D.
If the number of available IP addresses is exceeded, excess traffic will use the specified
address pool.

Explanation:
http://evilrouters.net/2009/07/09/configuring-basic-nat-with-overloading/
Overloading (having multiple clients all NAT’d to the same IP address) is probably the most
common implementation (especially for those of us who run NAT on a Cisco box at home!).