To effectively avoid collisions while backing, what should be regularly checked?

Answer: B — Mirrors and blind spots

Regularly checking mirrors and blind spots is essential for effectively avoiding collisions while backing. When driving a large vehicle, such as a truck, blind spots are significantly larger than in standard vehicles, making it critical to ensure that the area behind and alongside the vehicle is clear before moving. Mirrors provide a view of the surroundings, but they cannot cover all angles, which is why it's necessary to physically check blind spots by turning your head and ensuring there are no obstacles or pedestrians in those areas. This practice helps drivers anticipate potential hazards and react accordingly, significantly reducing the likelihood of accidents while reversing. Understanding the importance of mirrors and blind spots directly contributes to safer backing maneuvers. Drivers must train themselves to make this part of their routine whenever they are preparing to back up, ensuring they are vigilant about their environment.