Answer:
Decline in trade - shift to a rural society
Explanation:
The fall of the Roman Empire brought significant changes in the mode of rule and governance. After the fall, the empire was governed by the warrior kings. The traditional and community guidelines were given priority than the written laws. There was a drastic change in the economic stability of the empire as well. The economy inclined towards the agricultural sector as the result of the collapse of the trade. It was because of the decline in the trade that shifted the empire towards the rural society.
Immigration would be the best option
D is the only non fragment sentence here, so it must be correct
Harriet Tubman changed<span> the world by escaping from slavery, becoming an abolitionist and helping many slaves attain their freedom by means of the Underground Railroad, a secret network of routes and safe houses to aid runaway slaves.
Got that from Goggle.</span>