Hello.
The answer: C. Freeways
Its not gonna be Ships because in the untied states there is not gonna be bodys of water if you want to send something form ohio to kentucky. It also wont be trains because railroads arent as commen. So thereofre it would be Freeways becasuse most iteams that are needed to go state to state (a short or long distance) is suported by semi trucks.
Have a nice day