What effect does overloading a tanker have on vehicle stability?

Answer: C — Increases the risk of rollover and instability

Overloading a tanker has a significant negative impact on vehicle stability, primarily by increasing the risk of rollover and overall instability. When a tanker is overloaded, the center of gravity rises, making it more difficult to maintain balance, especially during turns, quick maneuvers, or on uneven surfaces. The weight distribution becomes uneven, which can lead to swaying or shifting of the liquid cargo inside the tank, further exacerbating stability issues. Additionally, an overloaded tanker may exceed the manufacturer's specified weight limits, compromising the handling characteristics of the vehicle. This can result in a diminished ability to steer effectively, brake safely, and maintain control, increasing the likelihood of accidents. Understanding the implications of overloading is crucial for maintaining safety on the road, as it directly correlates with the likelihood of a rollover, which can have severe consequences for the driver, other road users, and the environment.