Considering the situation described above, Pittsburgh-based Consol Energy's coal business largely depends on "Derived demand."
This is because a derived demand is a type of demand that arises from the demand for something related.
In other words, derived demand is a demand for goods and services like raw materials due to demand for its final products.
Hence, in this case, since the Pittsburgh-based Consol Energy's business is dependent on demand from particular consumers, whose business needs are also dependent on demands from specific consumers, this is then an example of Derived demand.
Therefore, in this case, it is concluded that the correct answer is option C. "Derived demand."
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