What should you do before changing lanes?

Answer: A — Check your mirrors and blind spots

Before changing lanes, it is essential to check your mirrors and blind spots to ensure that it is safe to do so. This precaution allows you to be aware of any vehicles that may be in adjacent lanes or approaching quickly from behind. Mirrors give you a view of the traffic around you, while checking your blind spots ensures you do not overlook any vehicle that may be in areas not visible in your mirrors. While it's important to wait until the lane is clear, simply observing the lane or signaling too far in advance can create confusion for other drivers. Accelerating to change lanes quickly can lead to unsafe maneuvering and increase the risk of an accident. Therefore, the safest and most responsible action before changing lanes is to thoroughly check your mirrors and blind spots for surrounding traffic.