Answer:
Tanks, machine guns, aircraft and chemical weapons were all refined and their technological secrets captured, causing lethal and simultaneously constructive effects. From such analysis, World War One is evident of a major modern turning point in history.
The entry of the United States was the turning point of the war, because it made the eventual defeat of Germany possible. It had been foreseen in 1916 that if the United States went to war, the Allies' military effort against Germany would be upheld by U.S. supplies and by enormous extensions of credit.
Explanation:
He lost the support of the people.
Answer:
"It shows how early civilizations maintained order and punished criminals"
Explanation:
This would be the best option from the list, since this was one of the first documents to explicitly tie certain punishments to different crimes.
While you didn't really provide the "following" as the comment above me states, in general, the advantage of secondary sources of primary ones is that they perhaps provide a more objective or even just a broader view on a certain topic. While a primary source of the American civil war would be a letter written by a soldier, a secondary source would be a book that describes more letters taken together and discusses possible information regarding them.