Question

The German tribe invited to cross the Danube to settle, which then defeated the Romans in battle and sacked Rome in 410, were the

Ostrogoths.

Huns.

Visigoths.

Franks.

Answer 1

The Huns

The Huns, who had set in motion this vast movement of peoples, moved westward from the center they had established on the plains of Hungary . Both Romans and Germans were terrified of these savage warriors whose only interest was plunder and bloodshed.

The Visigoths emerged from earlier Gothic groups (possibly the Thervingi)[3] who had invaded the Roman Empire, beginning in 376, and had defeated the Romans at the Battle of Adrianople in 378. The Visigoths under Alaric I invaded Italy and sacked Rome in 410; by this time, at least the elite were Arian Christians, but regarded as heretics by the Catholic Church.
The Visogoths sacked Rome in 410 so I am pretty sure your answer is D