Under the Option3x architecture, during the dual connection establishment process, the eNB will send an ERAB Modify IND message to the MME. Which network element does the IP address carried in the message belong to?

Under the Option3x architecture, during the dual connection establishment process, the eNB will send an ERAB Modify IND message to the MME. Which network element does the IP address carried in the message belong to?
A . eNB
B . gNB
C . SGW
D . UE

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Answer: B