When do historians believe that the use of slavery started? 6800 BC in Mesopotamia

618 AD in China

1200 BC in the Roman Empire

3500 BC in Babylonia​

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the answer is title i subtitle b

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.

i think you may have asked this twice, but i answered one of the