h Which of the following are alert systems that are used to indicate the presence of a tornado threat? A. A dedicated weather radio with visual and audible alerts B. Local weather forecasts and emergency bulletins C. Alarms and sirens D. All of the above

## Step 1<br />The question is asking about the alert systems that are used to indicate the presence of a tornado threat. The options provided are:<br />A. A dedicated weather radio with visual and audible alerts<br />B. Local weather forecasts and emergency bulletins<br />C. Alarms and sirens<br />D. All of the above<br /><br />## Step 2<br />Each of the options A, B, and C are methods used to alert people about the presence of a tornado threat. <br /><br />## Step 3<br />Option A, a dedicated weather radio with visual and audible alerts, is a common method used to alert people about severe weather conditions, including tornadoes.<br /><br />## Step 4<br />Option B, local weather forecasts and emergency bulletins, are also common methods used to alert people about severe weather conditions, including tornadoes.<br /><br />## Step 5<br />Option C, alarms and sirens, are also used to alert people about severe weather conditions, including tornadoes.<br /><br />## Step 6<br />Option D, "All of the above", includes all the methods mentioned in options A, B, and C. Since all these methods are used to alert people about the presence of a tornado threat, option D is the correct answer.