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the answer to your question is D. TAR SANDS. I really hope this helps you.

Answer: Tar sands

             

Explanation:

Tar sand is a mixture of clay, sand, water and bitumen. It is used for the synthesis of tar sand oil. The tar sands are the reserves of the oil. The oil production from the tar sands requires a large amount of land, energy and water as compared to the oil extraction from other oil reserves.  

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