Answer: D
Explanation:
some of you need to trust me tbh
Gold. Another reason why it was so wealthy was because it had great trade routes. But the answer your looking for is Gold.
He is talking about how someone in America shouldn't be judged on their social classes, rather what they do for the country and for themselves. This can also be interpreted as the Americans wanted to establish a nation in which everyone was equal which wasn't later done until a later date in time.