Boomtowns are communities that sprung up unexpectedly around new mines.
A boomtown is defined as a location with rapid population growth and economic expansion.
Boomtowns are generally mining settlements where a valuable mineral commodity has been discovered, such as precious metals, silver, or petroleum. It can occur in a discovery of gold, for example. After the gold is mined out, gold rush communities generally dwindle and vanish.
So,
Option "B" is the <em>correct</em> <em>answer</em> to the following <em>question</em>.
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C. is assembly line
A. is vertical integration
B. is horizontal integration
