What should a driver do before changing lanes?

Answer: B — Check mirrors and blind spots for surrounding traffic

Before changing lanes, it is crucial for a driver to check mirrors and blind spots for surrounding traffic. This practice ensures that the driver is fully aware of their surroundings, including any vehicles that may be in adjacent lanes or approaching from behind. Blind spots are areas that may not be visible in mirrors, and failing to check these can lead to dangerous situations, such as collisions with vehicles that the driver cannot see. By thoroughly checking mirrors and blind spots, the driver can ascertain whether it is safe to maneuver into the adjacent lane. This preventive measure is essential for promoting safety on the road, as it allows the driver to make informed decisions and avoid accidents. Proper lane change protocol fosters a safer driving environment for all road users.