What should you do before changing lanes?

Answer: A — Signal your intentions

Before changing lanes, signaling your intentions is essential for safe driving. When you signal, you communicate to other drivers that you plan to move into a different lane, which allows them to anticipate your actions and adjust accordingly. This step is crucial for maintaining a safe distance and preventing accidents, as it helps to establish a clear understanding of your movements on the road. While checking your mirrors is necessary to monitor your surroundings and ensure it is safe to change lanes, the act of signaling primarily focuses on communicating with other road users. Rapid acceleration or honking your horn is not appropriate behavior when changing lanes; both actions could create confusion or lead to dangerous situations on the road. Thus, signaling your intentions stands out as the key action to take before making a lane change.