What do the Ostrogoths, Mongols, and Vikings have in common?

Responses
A They failed to invade Europe.
They failed to invade Europe.
B They were all migratory groups.
They were all migratory groups.
C They all fell to Muslim dynasties.They all fell to Muslim dynasties.
D They each invaded the Roman Empire.

D They each invaded the Roman Empire.

B They were all migratory groups.

The correct answer is D: They each invaded the Roman Empire.

To arrive at this answer, we can analyze each of the options and determine which one aligns with historical knowledge.

Option A: "They failed to invade Europe." This statement is incorrect because both the Ostrogoths and Vikings successfully invaded parts of Europe, and the Mongols established the largest contiguous empire in history, including parts of Europe.

Option B: "They were all migratory groups." This statement is partially correct. All three groups were indeed migratory to some extent, but not all migratory groups necessarily have anything else in common.

Option C: "They all fell to Muslim dynasties." This statement is incorrect because only the Visigoths (a subgroup of the Goths, not the Ostrogoths) fell to Muslim dynasties during the Muslim conquest of Spain. The Mongols and Vikings did not fall to Muslim dynasties.

Option D: "They each invaded the Roman Empire." This statement is correct. The Ostrogoths, Mongols, and Vikings all invaded and had interactions with the Roman Empire at various points in history.

Therefore, the answer is D: They each invaded the Roman Empire.