Question: What is the primary purpose of the ABORT message sent by the network to the mobile station in the abort procedure?
Option 1: To request the mobile station to release any ongoing MM connection.
Option 2: To initiate a normal RR connection release procedure.
Option 3: To indicate the reason for abortion and locally release any ongoing MM connection.
Option 4: To establish a new MM connection.
Explanation: The ABORT message is sent by the network to the mobile station to indicate the reason for abortion, as specified in the Cause information element, and to locally release any ongoing MM connection. This is the primary purpose of the ABORT message in the abort procedure.