The answer to this question is C
Gunpowder, paper, printing, and the compass are sometimes called the Four Great Inventions of Ancient China.
Kites were first used as a way for the army to signal warnings.
Umbrellas were invented for protection from the sun as well as the rain.
Chinese doctors knew about certain herbs to help sick people.
The Industrial Revolution helped change many people from working in fields and farms to working generally in factories.
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