在MSR路由器RTA上执行如下命令： 
[RTA-Gigabit Ethernet0/0]ipaddress192.168.1.124
[RTA-Gigabit Ethernet0/0]quit [RTA]routerid2.2.2.2 
[RTA]ospf1router-id1.1.1.1 [RTA-ospf-1]quit 
[RTA]interfaceLoopBack0 
[RTA-LoopBack0]ipaddress3.3.3.332 
从以上配置可以判断RTA的OSPF进程1的RouterID是（）  

A.1.1.1.1
B.2.2.2.2
C.3.3.3.3
D.192.168.1.1