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The discovery of _______ led to a large population growth in California in the mid-1800s. A. internal combustion engine B. electricity C. coal D. gold

Respuesta :

the answer is 
D. gold
because of the California Gold Rush
AbbeySalomon
The answer is D, because the discovery led to things like the California Gold Rush, which was when thousands of people moved to California to make money from gold.

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