What is correct about the STP root bridge?

In the network as shown in the figure, the PIMSM protocol runs between RT1, RT2 and RT3, the RP is 1.1.1.1 RT3 is connected to the receiver, and IGMP is enabled on the corresponding interface, and the unicast routing table is viewed in RT3 as follows :
[RT3]display ip routing-table
Routing Tables: Public
Destinations: 10 Routes: 10
Destination/MaskProtoPreCost NextHop Interface
1.1.1.1/320SPF 10 1562 192.168.0.1 S0/2/0
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
192.168.0.0/30Direct 00192.168.0.2 S0/2/0
192.168.0.1/32Direct 00192.168.0.1 S0/2/0
192.168.0.2/32Direct 00127.0.0.1 InLoopO
192.168.1.0/300SPF 10 3124 192.168.2.1 so/2/1
192.168.2.0/30Direct 00192.168.2.2 so/2/1
192.168.2.1/32Direct 00192.168.2.1 so/2/1
192.168.2.2/32Direct 00127.0.0.1 InLoopO
Then, when the receiver (Receiver) sends a group join request, which of the following routers have (*, G) entries

The customer's LAN switch SWA dual-uplink connection switch SWB and switch SWC, through SmartLink to ensure the reliability of the link can be learned from the above information ___

The following statements about BSR and RP in PIMSM are correct:

The following statements about the registration process of PIM SM are correct (choose one or more)