B. child laborers and D. miners
Hope this helps :)
The answer to this would be C. The other two would not make sense or fit for the time period. Also c is true, just learned this in history too!
The Spanish empire explored Florida to California
the French empire explored Louisiana
the English empire explored the East Coast
The Chinese were the origins of the Silk Road providing many exports to the rest of the world: The Chinese exported porcelain, tea, silk, and other items.
The Ottomans were the trading post for Silk Road goods into Europe: European traders would come to the Ottoman Empire to trade their goods for goods from all along the Silk Road.