The overall structure of the "From Farms to Factories" section of the article is that B. The section uses a cause-and-effect structure to explore why children were hired to work in factories and mines and the dangerous conditions they worked under.
It should be noted that a text structure simply means the way that the information in a passage are arranged to convey information effectively.
In this case, the overall structure of the "From Farms to Factories" section of the article is that the section uses a cause-and-effect structure to explore why children were hired to work in factories and mines and the dangerous conditions they worked under.
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