Final answer:
Modern 4WD/AWD systems automatically adjust for changing road conditions, eliminating the need for manual shifting between modes.
Step-by-step explanation:
Option B is the correct answer. Modern 4WD/AWD systems automatically adjust for changing road conditions, eliminating the need for manual shifting between modes. These systems use various sensors to detect traction loss and distribute power accordingly to the wheels with the most grip. For example, if a vehicle's front wheels start slipping on ice, the system will transfer power to the rear wheels to improve traction.
By keeping 4WD/AWD engaged, drivers can experience optimal safety and stability in various conditions. The additional traction provided by 4WD/AWD can be especially useful in off-road situations, snowy or icy roads, and during fast acceleration. However, it's important to note that 4WD/AWD does not guarantee invincibility on all terrains, and drivers should still exercise caution and drive responsibly.