Answer:
Currently no one knows who fired the shot. Many theories were put out, but it is still a mystery.
Explanation:
The answer is B because
<span> Progressives believed that the growth of industries and the growth of cities caused social problems for our society.</span>
Capitalism
Capitalism is an economic system in which private individuals or businesses own capital economic system in which private individuals or businesses own capital goods. The production of goods and services is based on supply and demand in the general market