Respuesta :
B. that’s what I think. Because they are making all of these entrances to there city so they would make them for trade.
Answer:Trade began expanding throughout the Near East region.
Explanation:As the Persian Empire grew, so did its need to trade goods within the empire and with its neighbors. The rulers spent money to build transportation systems to make trade easier. As a result, the Persian Empire became a great trade center in the ancient Near East.