The story of his ruin is simple and obvious; and, instead of inquiring why the roman empire was destroyed, we should rather be surprised that it had been subsisted so long. what argument is the author making in this passage?

The answer is: "It is a wonder that Rome did not fall even sooner."

Explanation:

the answer is migration

the navigation act prevented the colonies from exporting to countries other than britain and it prevented the importation of goods by other countries as well. so i believe the correct answer is d. other nations could not deliver goods to the colonies.

hope this .