Which is an example of a run-on? A. Until the nineteenth century, travelers and their wheeled wagons could move at about six mil
es per hour. B. An important event was the invention of the wheel, later crude carts and wagons were invented. C. The trails used by pack animals could not be used by wheeled wagons, so roads had to be built. D. Transportation was aided by inventions such as the horse collar and coaches with springs.
