Which is not a part of the fracking process? A. Water, sand, and chemicals are pumped into a well. B. A well is drilled deep underground. C. Natural gas is forced out of shale rock under pressure. D. Natural gas mixes with chemicals and is extracted.

C

Explanation:

Fracking is a procedure that splits open rock with a high-pressure stream of water, and then “props” it open with tiny grains of sand, glass, or silica. This allows gas to flow more freely out of the well.

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