如图所示组网中,RT1、RT2和RT3之间运行PIM-SM协议,RP为1.1.1.1RT1与RT2下游接口上连有<br /> 组播源,RP上有下游接收者那么,当RP发送注册停止消息后,下列哪些路由器上存在(S,G)表项()。<br /> <img height="461" src="https://nimg.ppkao.com/2018-07/yuanhao/2018071215211040150.jpg?sign=1f84eabad5c5ace4c1bf0d93644045b2&t=62d479d1" width="510" /> <br />
A、RT1
B、RT2
C、RT3