I'm pretty sure its C. Crude means not yet processed or refined. It makes the most sense.
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Klondike gold rush of the 1890s
The Call of the Wild is set in the midst of the Klondike gold rush of the 1890s. During this time, more than 30,000 people traveled to the area near the convergence of the Klondike and Yukon rivers in Yukon territory, just east of what is today Alaska.
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When a disaster happens, drone's can SCAN damaged buildings. They can also carry RESOURCES to people who are hurt
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im just answering based of of common knowledge
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therefore or she
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i think it's one of those