Refer to the exhibit. What statement is true of the configuration for this network?（）

• A、The configuration that is shown provides inadequate outside address space for translation of the number of inside addresses that are supported.
• B、Because of the addressing on interface FastEthernet0/1, the Serial0/0 interface address will not support the NAT configuration as shown.
• C、The number 1 referred to in the ip nat inside souce command recerences access-list number 1.
• D、ExternalRouter must be configured with static routers to network 172.16.2.0/24