13. If your headlights ever fail, you should: A. Try using the high beams, so you can still see. B. None of these answers are correct C. Trust your parking lights to make you visible to other vehicles. D. Try turning the light switch on and off rapidly.

## Step 1<br />This problem is about the correct course of action when a driver's headlights fail while driving. The options provided are:<br />A. Try using the high beams, so you can still see.<br />B. None of these answers are correct<br />C. Trust your parking lights to make you visible to other vehicles.<br />D. Try turning the light switch on and off rapidly.<br /><br />## Step 2<br />Option A suggests using high beams, but this is not a safe option as it can blind other drivers and potentially cause an accident.<br /><br />## Step 3<br />Option B states that none of the answers are correct. This is a placeholder option and does not provide a solution to the problem.<br /><br />## Step 4<br />Option C suggests relying on parking lights to make the vehicle visible to other vehicles. However, parking lights are not designed for driving and may not provide sufficient visibility.<br /><br />## Step 5<br />Option D suggests turning the light switch on and off rapidly. This can create a flashing light that can alert other drivers and potentially improve visibility.