Question: Upon receiving a ProSe Proximity request, what action does the ProSe Function of the targeted UE take if it determines that the requesting and targeted UEs are unlikely to enter into proximity within the specified time window?
Option 1: Returns a Result Code of "DIAMETER_ERROR_USER_UNKNOWN"
Option 2: Acknowledges the reception with a Result Code of "DIAMETER_SUCCESS" but without location information
Option 3: Returns a Result Code of "DIAMETER_ERROR_PROXIMITY_REJECTED" and stops processing the request
Option 4: Sets the Result Code to "DIAMETER_UNABLE_TO_COMPLY" due to unspecified internal errors
Explanation: If the ProSe Function determines that the UEs are unlikely to enter into proximity based on their last known locations and the received time window, it returns a "DIAMETER_ERROR_PROXIMITY_REJECTED" Result Code, ensuring efficient resource management by not allocating resources for improbable proximity events.