Ida M. Tarbell The History of the stand oil company could best be used as evidence to support which of the following conclusions about american society during the late 19th and early 20th century?

it proved indian land claims were unjustified.

what is the question

urban people were mostly involved in jobs that required phyisical labor they are paid daily wages (minimum wages) from which they evoke their living. daily wages also mean that the day they don't turn up for work ,even due to sickness, they aren't paid anything.