Which of the following is a recommended action before changing lanes?

Checking your mirrors is a crucial step before changing lanes because it allows you to be aware of your surroundings. By doing so, you can see if there are vehicles or obstacles in the lane you intend to move into, thus ensuring that the lane change can be made safely. This action helps in assessing the speed and position of other vehicles, which is vital to avoid collisions.

Utilizing mirrors increases your field of view and minimizes blind spots, helping you make informed decisions about when it is safe to change lanes. It's part of defensive driving practices that prioritize safety for both yourself and other road users. This proactive approach is essential for maintaining control over the vehicle and ensuring smooth transitions between lanes.