Which of the Following Statements About World War I Is

Which of the following statements about World War I is accurate?

A) It began with the assassination of the heir to the British throne.
B) It produced casualties on a massive scale, due in part to new military technologies such as tanks and submarines.
C) It had very little to do with European colonial possessions overseas.
D) It inspired a new sense of American identity, as Americans all supported the same side in the war.
E) Feminists and social reformers were convinced the war would bring about social equality.