382某私网设备A的IP地址是192.168.1.1/24，其对应的公网IP地址是2.2.2.1；公网设备B的IP地址是2.2.2.5。若希望B能ping通A，可以在NAT设备上使用下列哪项配置？
A.aclnumber2000
Rule0permitsource192.168.1.10.0.0.255
Nataddress-group12.2.2.1
InterfaceEthernet0/1
Natoutbound2000address-group1
B.aclnumber2000
Rule0permitsource192.168.1.10.0.0.255
Nataddress-group12.2.2.1interfaceEthernet0/1
Natoutbound2000address-group1no-pat
C.natserverprotocolicmpglobal2.2.2.1inside192.168.1.1
D.natserverprotocolicmpglobal192.168.1.1inside2.2.2.1
正确答案是C