Which event is considered the immediate cause
of world war i?
(1) signing of the treaty of versailles
(2) invasion of poland by germany
(3) assassination of archduke francis ferdinand
(4) use of unrestricted submarine warfare by
germany

What was the most explosive issue facing the united states prior to the start of the civil war?

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.

Which statement is the best summary of this passage?