Question: What happens when the "Emergency Category" information element is not included in the message?
Option 1: The network assumes a specific emergency call.
Option 2: The network ignores the emergency call.
Option 3: The network assumes a non-specific emergency call.
Option 4: The mobile station re-sends the message with the emergency category.
Explanation: According to the specification, if the "Emergency Category" information element is not included, the network shall by default assume a non-specific emergency call. This ensures that the emergency call is still handled appropriately even if the specific category is not provided.