Answer: 78% carbon, 21% oxygen, 1% other
Explanation:
The correct answer is <em>b), most states had passed some safety laws, but enforcement varied.
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As the laws were not enforced, the working conditions were to a minimum. People worked in horrible conditions. Most of them risk themselves doing its activities due to unsafe practices. Accidents were common because there were no training and safety measures to prepare the worker and prevent labor risks.
