Final answer:
The Selec-Terrain system setting that is used in conjunction with Hill Descent Control during steep downhill maneuvers is D) Rock. This setting provides optimal control and stability on rocky or uneven surfaces. The correct answer is D) Rock.
Step-by-step explanation:
The Selec-Terrain system is designed to optimize the drivetrain settings of a vehicle for different types of terrain. When it comes to steep downhill maneuvers where enhanced control is necessary, the Selec-Terrain system includes a specific setting that can be used in conjunction with Hill Descent Control. This feature assists in maintaining a consistent vehicle speed while descending steep inclines without the need for manual braking.
For these types of situations, the correct position on the Selec-Terrain system to use is D) Rock. This setting provides the best combination of throttle control, traction, and stability, which is crucial for off-road driving on rocky or uneven surfaces. Therefore, the correct answer is D) Rock.