Which of the following conditions can cause multicast traffic to fail to reach the user? (Multiple Choice)

Which of the following conditions can cause multicast traffic to fail to reach the user? (Multiple Choice)
A . The router does not have dynamic routing
B . The router-related interface is not be enabled the PIM protocol.
C . The upstream router discards the received Graft message.
D . The receiver router discards the received IGMP Report.

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Answer: ABCD