To prevent a rollover, what is one of the recommended driver methods?

Answer: C — Keep the cargo close to the ground

Keeping the cargo close to the ground is a vital method to prevent rollovers in vehicle combinations. When the center of gravity of a truck and trailer is low, the vehicle becomes more stable, which is crucial during turns or maneuvers. A high center of gravity can easily lead to a loss of control and increase the risk of a rollover, especially if the load shifts during transit or if the vehicle encounters uneven road surfaces. Properly securing cargo and distributing weight evenly can significantly reduce the chances of tipping over. The other methods mentioned either contribute to instability or do not address the specific dynamics involved in maintaining balance, making them less effective in preventing rollovers.