In the 500s b. c., Persia organized an army made up of slaves.
organized city-states throughout its land.
seized power from the Greeks and ruled the Mediterranean area.
built an empire about the size of the continental United States.

Wow that sounds like a very good question.

Explanation:

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.