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

Sole i will mark brainlist to who answer

The 15th amendment to the u. s. constitution, ratified in 1870, deals with what issue? a. prohibition of alcohol b. voting c. declaring war d. free speech

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.