The phrase "All roads lead to Rome," refers to:
A.) the extensive construction of roads by the Romans as they expanded their empire
B.) the concept that a vast marketplace was brought together under the centralized rule of Rome
C.) the lack of a developed transportation network leading to destinations other than Rome
D.) the requirement that all imperial subjects make a trip to Rome once in their lifetimes
Answer: B.) the concept that a vast market place was brought together under the centralized rule of Rome