The correct answer is: A few miners found gold and other valuable metals, leading many people to establish stores and other businesses near the newly rich.
Mining discoveries, such as those during the California Gold Rush, attracted many prospectors and entrepreneurs who wanted to capitalize on the wealth generated by mining. This influx of people not only led to the establishment of mining camps and towns but also spurred the growth of related businesses, as merchants set up shops to cater to the needs of the miners.