Final answer:
According to the federal government, carriers are responsible for creating and keeping accident registers that include copies of accident reports.
Step-by-step explanation:
The correct answer is b) Carriers.
According to the federal government, carriers are responsible for creating and keeping accident registers that include copies of accident reports.
This information can be found in the U.S. Census Bureau's Motor Vehicle Accidents and Fatalities section, where it mentions that the carriers are the ones who are responsible for maintaining these registers.