Which two options should be selected in the SIP trunk security profile that affect the SIP trunk pointing to the VCS? (Choose two.)

Which two options should be selected in the SIP trunk security profile that affect the SIP trunk pointing to the VCS? (Choose two.)
A . Accept Unsolicited Notification
B . Enable Application Level Authorization
C . Accept Out-of-Dialog REFER
D . Accept Replaces Header
E . Accept Presence Subscription

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Answer: AD