Which of the following is not a reason the Romans developed colonies and built extensive road systems?
a.
The Romans developed colonies and built road systems to maintain their conquered territories.
c.
The Romans developed colonies and built road systems to open trade and travel between their conquered territories.
b.
The Romans developed colonies and built road systems in order to conquer more territory.
d.
The Romans developed colonies and built road systems to provide their rulers with safe havens in case of siege.