The cause of the United States entering World War 1 in 1917 was because Germany sank their ship the Lusitania.
It sounds like you might have a list to choose from, but there is nothing here. Is there more to the question? :)
The anwser is B.) Mesopotamians
Because they were different from other city-states
I believe that is the correct answer
D the treaty mandated punitive war reparations from Germany
