The cotton gin was introduced in 1793. What was the effect of this invention in the US?
✔ 67%70% 65% 75%
✔ steadily declinedsteadily increasedstayed the same
✔ increaseddecreased
400,000✔ 600,000800,000
It decreased slightly.It increased slightly.✔ It increased dramatically.
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✔ coal and lignite depositsiron ore depositsrailroadscoal and iron ore deposits
✔ railroadsindustrycoal minesiron ore mines
rural areas✔ citiesFrancethe United States
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