13. The most important safety device on your lit truck is: A. Seat belt B. Warning light C. Backup alarm D.You

## Step 1<br />This problem is a multiple-choice question related to safety measures on a lit truck. The options provided are: A. Seat belt, B. Warning light, C. Backup alarm, and D. You.<br />## Step 2<br />The question asks for the most important safety device on a lit truck. The options A, B, and C are all physical safety devices that can be used to prevent accidents.<br />## Step 3<br />However, option D, "You", is not a physical safety device. It refers to the driver or operator of the truck. The driver's role is crucial in preventing accidents as they are responsible for operating the truck safely.<br />## Step 4<br />Therefore, the most important safety device on a lit truck is the driver, which is option D.