When driving on mountain roads during daytime, you should: When driving on mountain roads during daytime, you should:

• A. blow your horn every 1 minute
• B. blow your horn when you think it's necessary
• C. blow your horn when approaching a blind curve
•  

  The correct answer is C

   

  Do this as a precaution to warn possible incoming vehicles that you are also approaching. During the night you may also flash your headlights to warn them.