<em>James Watt was an inventor and mechanical engineer whose improvements in steam engine technology drove the Industrial Revolution. Watt did not invent the steam engine. He made important changes to the design, increasing efficiency and making steam engines cheaper to run.</em>
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I believe A. is the answer
Sorry if wrong
Slavery, and invention of the cotton gin, the internal conflict within the Congress
The President is the head of the executive branch, which makes laws official. The President is elected by the entire country and serves a four-year term