They could use the fief in exchange for military service. Hope this Helps!
Answer:
D.)all started in Mesopotamia
Explanation:
Hope this helps
From,
1kvibing
The main reason why so many of the machines that sped up production and travel were invented during the 18th and 19th centuries is because this was the time of the Industrial Revolution, which saw a great increase in factory production, which helped create the machines in question.
Answer: It lead into World War II
Explanation:Hoped I helped :)