Why did the roman government have large expenses?

Part of the money went into the maintenance of the army and the vast bureaucracy required by a centralized government. Both things were very expensive.

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.

The answer is a c b d a c b d