What should a driver do before making a lane change?

Answer: A — Signal, check mirrors, and look over shoulder

The correct response involves signaling, checking mirrors, and looking over the shoulder. This sequence is essential for ensuring the safety of all road users. Signaling beforehand alerts other drivers about your intention to change lanes, allowing them to react appropriately. Checking mirrors helps the driver to assess the surrounding traffic and identify any vehicles that are in the adjacent lanes, while looking over the shoulder provides a final confirmation that there are no blind spots or other obstacles that haven't been seen in the mirrors. Being thorough in this process minimizes the risk of accidents. It allows the driver to be aware of their surroundings and make informed decisions, fostering a safer driving environment. Therefore, taking these steps helps prevent collisions that could result from changing lanes without proper checks.