One of the last two definitely prob the 4th one
Sir Martin Frobisher, the English explorer, was the first European to explore (1576–78) the eastern approaches of the passage. John Davis also explored (1585–87) this area, and in 1610 Henry Hudson sailed north and visited Hudson Bay while seeking a short route to Asia.
The trade route is the Silk Road
Answer:
It collapsed in 1929 and 1933. Just looked it up, your welcome.
During the first 50 years of the nation, diplomats were guided by the idea that the United States should observe political isolation from European powers during peacetime and maintain strict neutrality during periods of war.