Which two results regarding the messages can the engineer expect?

**An engineer is troubleshooting Precision Time Protocol on Cisco ASR 9000 router and noticed the protocol is running in a Multicast mode. Which two results regarding the messages can the engineer expect? (Choose two)
A. IPTP messages that use unicast messages and those that use multicast messages must be specified.
B. Announce and Sync messages are sent as multicast messages.
C. Signaling. Delay-Request and Delay-Response messages are sent as multicast messages
D. All messages for PTP will be sent as multicast messages
E. Announce and Sync messages are sent as unicast messages
F. Signaling, Delay-Request, and Delay-Response messages are sent as unicast messages

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