Answer:
No answer give 100 points
Unrestricted submarine warfare, which became prominent in World War I, meant that submarines could sink any time of vessel at any time without warning. Before this, they had to surface first and place crews on lifeboats.
Samuel Adams was a Founding Father of the United States and a political theorist who protested British taxation without representation, uniting the American colonies in the fight for independence during the Revolutionary War.
Hope this helps!