What factor increases the risk of rollovers in large trucks?

The risk of rollovers in large trucks is significantly increased by both high-speed turns and heavy cargo loads. When a truck takes a turn at high speed, the centripetal force acting on the vehicle increases, which can lead to the truck's center of gravity shifting and potentially causing a rollover. Additionally, when a truck is loaded heavily, it has a higher center of gravity and increased weight, which can further enhance the likelihood of a rollover during maneuvers. The combination of these two factors—turning quickly while carrying a lot of weight—creates a higher susceptibility to losing balance, making this the correct answer. Each factor independently contributes to instability, but their combination exacerbates the risk even more.