Answer:
A, building a large transportation network of roads and bridge
Explanation:
The romans used built roads to trade goods, education, religion and culture making Roman a diverse empire with different roads and bridges to make it mix society and influential.
Sorry for the argument I was a bit mad because the other user was pretty funny every question he/she was their and it was 4 times in a row, I don't think you would get mad but you did and sorry for calling you selfish. I had the answer and explanation but you guys were going off and making me feel down on my self :I, But it's all good :)
