In europe, the foreign invaders were primarily germanic tribes and huns. where did the huns originate?
central asia
modern-day hungary
the british isles
persia

Central Asia

The origins of the Huns are still unclear. However, most experts agree that they originated somewhere in Central Asia. The Huns were nomads who spread from Central Asia to the Caucasus and Eastern Europe between the 4th and the 6th century AD. The Huns were recorded in Roman history because of their frequent and devastating raids into the empire.

answer; i do believe its (b) 12.5 years of age;

b) to encourage free trade