Which two limitations of PIM snooping are true? (Choose two)

Which two limitations of PIM snooping are true? (Choose two)
A . 224 0 1 39 and 224 0 1 40 are always flooded
B . If non-PIMv2 multicast routers are on the network, they are flooded with all traffic
C . All join and prune messages are flooded to all router ports
D . All traffic in sparse group mode is treated as unknown traffic and dropped
E . Directly connected sources are supported only for unidirectional PIM groups

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Answer: A, B