What additional feature, if specified on the vehicle, would help Nathan get more traction when stuck in the mud?

Explanation: • A 'PTO': No, a PTO is a power take off device which allows ancillary equipment to be driven from the vehicle - it does not affect the vehicle's traction.
•An on-board weigher: No, this would simply calculate the weight bearing down on each axle and do nothing to improve the vehicle's grip.
•An automatic sheet and tailgate: No, although helpful to the driver when loading/unloading, this feature would not give the vehicle more traction/grip.
•A diff lock: Yes, by locking the wheels across an axle this feature would provide extra grip if one wheel started spinning.

Category: CPC Case Studies: Technical Matters