How much gold , arriving in San Francisco, triggered the gold rush?

Question

a- 500 lbs

b- 1 ton

c- 2 tons

My answer is 2 tons

Answer 1

I wish you'd clarified this from the beginning.

You must be talking about the Klondike Gold Rush, not the California Gold Rush.

http://www.nps.gov/klgo/forkids/the-story-of-the-klondike-gold-rush-pg-1.htm