Question: Which of the following warning systems utilizes the Kill procedure to stop broadcasting warning messages in an E-UTRAN?
Option 1: ETWS (Earthquake and Tsunami Warning System)
Option 2: CMAS (Cellular Messaging Alert System) for all types of alerts
Option 3: CMAS (Cellular Messaging Alert System), but not ETWS
Option 4: Both ETWS and CMAS equally utilize the Kill procedure
Explanation: The correct answer is Option 3 because, according to the specifications, CMAS (an example of a warning system) uses the Kill procedure to stop broadcasting warning messages, whereas ETWS (Earthquake and Tsunami Warning System) does not utilize this procedure. This highlights the distinction in how different warning systems manage the cessation of message broadcasts within E-UTRAN networks.