The German Use of submarine warfare caused tension to increase between the United States and Germany. Their submarines were called U-Boats.
I believe the answers are
1. A
2. C
3. A
Karl Marx wrote Das Kapital and co-authored The Communist Manifesto
Answer: the Mongols constructed the larges Eurasian empire to date. ... They encouraged trade and exchange across the Eurasian network. • The fostered the spread of the Black Death across Eurasia.
Explanation: