Which details from Passage I reflect the historical influence of the Gold Rush/Westward Expansion?

A. he was the curiosest man about always betting on any thing that turned up you ever see, if he could get any body to bet on the other side, and if he couldn't he'd change sides.

B. Any way that suited the other man would suit him any way just so's he got a bet, he was
satisfied. But still he was lucky, uncommon lucky: he most always come out winner.

C. in the winter of 49 or maybe it was the spring of "50 I don't recollect exactly, somehow, though what makes me think it was one or the other is because I remember the big flume warn't finished when he first came to the camp:

D. There was a feller here once by the name of Jim Smiley.