Which TWO of the following statement best summarize the central ideas of the text? A. WWI was caused exclusively by the assassination of Archduke Franz Ferdinand. B. Historian Henry Kissinger was the most accomplished U. S. Secretary of State in American history. C. No one nation or group can be singled out to blame for the outbreak of WWI. D. The roots of WWI were planted long before the assassination of Archduke Franz Ferdinand. E. Trench warfare, because it was so deadly, was outlawed in future warfare at the Paris Peace Convention. F. WWI permanently brought the U. S. out of isolation, deeply involving it in future global matters, like WWII