Final answer:
The correct option is (A); A part-time four-wheel-drive system is unable to do independent wheel rotation and enhanced off-road climbing ability.
Step-by-step explanation:
A part-time four-wheel-drive system, which lacks a center differential, is unable to do A) independent wheel rotation. The center differential is responsible for allowing each wheel to rotate at different speeds, which is crucial for the independent wheel rotation seen in full-time all-wheel-drive systems. Without a center differential, the wheels of a part-time four-wheel-drive system are locked together, preventing independent rotation.
This lack of independent wheel rotation in part-time four-wheel-drive systems can impact the vehicle's performance off-road, as it hinders its ability to traverse uneven terrain and maintain traction in certain situations, which compromises its D) Enhanced off-road climbing ability.