Final answer:
The bus companies would have preferred the definition of the market for intercity transportation, including personal cars, car rentals, passenger trains, and commuter air flights.
Step-by-step explanation:
The bus companies, Greyhound Lines, Inc. and Trailways Transportation System, would have preferred the definition of the market for intercity transportation, including personal cars, car rentals, passenger trains, and commuter air flights. They would prefer this definition because it would broaden the scope of the market and include more transportation options, allowing them to have a larger market share and potentially increase their revenue.