How can you check for vehicles in your blind spots if the side rearview mirrors show only narrow angles of view?

• By asking the person sitting behind you to check
• By performing a shoulder check by turning your head to glance over your shoulder.
  Explanation:

  "

  Since side rearview mirrors only provide a narrow field of view, the best way to ensure there are no vehicles in your blind spots is to turn your head and perform a shoulder check. This method helps you see areas that mirrors can't cover for safer lane changes and merges.

  "
• By leaning your head out of the window
• There is no way to check; you must take the risk.