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The richest discovery in the history of mining occurred in 1873. This so-called "Big Bonanza" made _______ the richest man in the world.

a. John Mackay
b. John Placer
c. Henry Sutter
d. Henry Comstock

User Upitau
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1 Answer

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A.) John Mackay
I just took the test it's right but you can check yourself if you want.
User Milad Abooali
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