Which statement is correct regarding the operation of DHCP?（）
- AA DHCP client uses a ping to detect address conflicts.
- BA DHCP server uses a gratuitous ARP to detect DHCP clients.
- CA DHCP client uses a gratuitous ARP to detect a DHCP server.
- DIf an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.
- EIf an address conflict is detected, the address removed from the pool for an amount of time configurable by the administrator.
- FIf an address conflict is detected, the address is removed from the pool and will not be reused until server is rebooted.