I am pretty sure the answer is C the trade since pretty much every test I took the answer was always trade since trade was very important back then and trade is what made people come to their areas so the answer must be trade but you should probably get someone else to back up the answer since I`m not completely sure if its the answer but it might be.
<em>The reason that drew tribes to migrate to Europe around 300 was the vast trade networks.
</em>
This migration period also receives the name of Barbaric invasion and was the movement of people to European territory from 300 to 700 CE. Tribes like the Vandals, the Huns, Bulgars, and the Goths emigrated to Europe after the fall of the Roman Empire due to the trade networks and new opportunities this region offered.
