Which reformer took up the cause of exposing the dangers and disgraceful working conditions of child labor?

Ida Tarbell

Upton Sinclair

Samuel McClure

Mother Jones

mining and farming towns developed

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necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.