Question: What action should an EPC entity take when it receives a response message with one or more dedicated bearer context(s) associated with the Cause code "Context Not Found" while the PDN connection is known by the peer?
Option 1: The EPC entity shall send a Modify Bearer Request to the peer.
Option 2: The EPC entity shall delete the corresponding bearer context(s).
Option 3: The EPC entity shall ignore the response message and continue with the existing bearer context(s).
Option 4: The EPC entity shall send an error message to the peer.
Explanation: According to the requirements, when an EPC entity receives a response message with one or more dedicated bearer context(s) associated with the Cause code "Context Not Found" while the PDN connection is known by the peer, it should delete the corresponding bearer context(s). This ensures that the EPC entity maintains accurate and up-to-date information about the bearer contexts.