Final answer:
Fork trucks in a warehouse environment should yield to pedestrians for safety reasons.
Step-by-step explanation:
In a warehouse environment, fork trucks should yield to pedestrians (option c) for safety reasons. This ensures that pedestrians have the right of way and helps prevent accidents or injuries. While fork trucks may have the ability to travel at high speeds, it is recommended that they should not do so as it increases the risk of accidents.
Additionally, fork trucks do not always need to drive in reverse (option b) and may need to use forward motion depending on the situation. Lastly, while some warehouses may have fixed routes for fork truck travel, it is not a universal requirement (option d).