It was constructed in 2500 B.C.
Possible answer: Its most significant consequence was the entrance of the United States into World War II. The US had previously been officially neutral but subsequently entered the Pacific War, the Battle of the Atlantic and the European theatre of war.
explanation: unsure of context
Yes, most of the travelers on the Oregon Trail was young families. In the mid-19th century, the Oregon Trail was the main pathway for American emigrants searching for new lands and opportunity on the frontier, and most of the emigrants traveling were young families.
That would be c I believe
