well A and C both happened in the 80's but B was in the 70's.. So someone made the choices unreliable. But the best answer would be
<u>D.) All of the above.</u>
John Sutter (born Johann August Suter; February 23, 1803–June 18, 1880) was a Swiss immigrant in California whose sawmill was the launching spot for the California Gold Rush. Sutter was a prosperous pioneer and land baron when one of his sawmill workers found a nugget of gold at the mill, on January 24, 1848.
Hmm.. To mainly profet off of trde?
The United States, Great Britain, France and Japan.