Your answer is: Because President Roosevelt
granted the navy permission for U.S. warships to attack German U-boats in self defense.
Is this multiple choice? If not, i'd say that it is important for a historian to be sure of the authenticity of a primary source because a primary source needs to be proven to be accurate. It is important to study and make sure the source is authentic because the accuracy must be proven
The Crusades is the series of wars between the two groups but if you're looking for a certain one I can further elaborate.
Answer:
The diagram that accurately reflects how a historical society influenced the modern U.S. government is "Ancient Greece > Developed ideas of democracy.
Explanation:
