The discovery of gold in california in 1848 was followed by a)protest b)investigation c)mass migration . hundreds of thousands of americans and foreigners poured into california, leading to the creation of mining towns. these migrants were called the forty-niners. while some found gold, others found a)salvation b)business opportunity c)silver. the increase in population created a market for a variety of services and products. enterprising individuals who opened shops and stores made fortunes. thus, the gold rush opened up opportunities for fulfilling the american dream.