Which of the Following Messages Are Exchanged Between the MME

Which of the following messages are exchanged between the MME and the SGW during the UE attachment procedure? (Choose two)

A) Create Session Request / Create Session Response
B) Credit Control Request / Credit Control Answer
C) Attach Request/Attach Accept
D) Update Bearer Request / Update Bearer Response
E) Modify Bearer Request / Modify Bearer Response

Correct Answer:

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