如图所示的 PIM-SM 组播网络, R3 为 RP,所有路由器运行 OSPF,且每条链路的Cost 值相等,R2 和R4 配置了永远不发起 SPT 切换,则 Receiver1 和 Receiver2 接收组播数据流的稳定路径分别是以下哪项?
A.正确答案AD"Receiver1:Sourcel-R1-R2-R3-R4-Receiver 1
B.Receiver1" Receiver2:Sourcel-R1-R2-Receiver2
C.Receiver1:Sourcel-R1-R4- Receiver1
D.Receiver2:Sourcel-R1-R2-R3-R2-Receiver2"