If there are blind spots, how should a person change lanes safely?

• They should get out of the car and check both sides before changing lanes.
• They can just take a guess and change lanes whenever they want.
• Perform a shoulder check and check in the mirror before changing lanes.
  Explanation:

  "To change lanes safely when there are blind spots, you should perform a shoulder check in addition to checking your mirrors. This ensures that you can see areas not visible in your mirrors and make a maneuver."
• They should not change lanes.