What group of people is believed to have invented gun powder?

D. The Chinese because Gunpowder was invented in the 9th century in China, and the earliest record of a written formula for gunpowder appears in the 11th century Song dynasty text, Wujing Zongyao. This discovery led to the inventionof fireworks and the earliest gunpowder weapons in China.
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The Group Of People Who Are Believed To Make Gunpowder Is The Chinese Group.