It was for a faster route to the united states, so it is b
I think the answer would be A.
I think that is it safe to say (I mean by this: check if it's among your options) that both individual and international trade are voluntary exchange of goods -both parties have to agree on it without being forced to it. Also they should be mutually beneficial - otherwise the two parties would have have agreed!
True, because as time goes on, cultures mix and evolve according to what resources are available.