Answer: it would be the renewal of unrestricted submarine warfare from Germany. Otherwise C
Explanation: The Germans continue to become more and more ferocious with their U-boat attacks, their hopes were to cripple the United Kingdom by silently attacking supply ships. Once the Lusitania was sunk the world became aware of the tragedies of unrestricted, moral ignored warfare
In "trade" and mercantilism .
Serfs, also known as peasants, were the lowest class of citizen in feudal societies. They were allowed to live on land own by Lords in return for labor, which was practically slavery.
Thomas Jefferson, hope this helps
