Final answer:
The definition of on-duty time for a commercial motor vehicle (CMV) driver includes driving, waiting to be dispatched, and loading or unloading a CMV.
Step-by-step explanation:
The on-duty time for a commercial motor vehicle (CMV) driver includes tasks like driving, waiting to be dispatched, and loading or unloading a CMV. Therefore, all of the above options (A, B, and C) would be included in the definition of on-duty time.