If there are multiple receivers in a multicast group, the administrator enables IGMP-Snooping on the switch connecting the receiver. After the receiver receives the general query message from the querier, the receiver receives multiple receivers. How to respond?

If there are multiple receivers in a multicast group, the administrator enables IGMP-Snooping on the switch connecting the receiver. After the receiver receives the general query message from the querier, the receiver receives multiple receivers. How to respond?
A . All recipients will respond to the Report message.
B . Only when IGMPv1 is running, all receivers respond to the Report message.
C . The first responder with a response timeout sends a Report message, and the other recipients do not send it.
D . Only the IGMPV2 is running, and all receivers respond to the Report message.

Answer: A