I think the answer is B not shure though.....
Answer:The coal-fired steam engine was in many ways the key technology of the Industrial Revolution. Steam power was first used to pump water out of coal mines by Thomas Newcomen, who invented the first steam engine that truly worked in 1712. ... Watt had taken Newcomen's design and improved upon it.
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The act or state of learning about or learning something new and finding more information out about it as time progresses forward. Understanding and obtaining new information in a period of time.
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