Gas hydrates, chemical compounds of water and natural gas, are increasingly being studied for their potential to be huge reservoirs of energy, possibly causing sea floor instability, and significant contributors to global warming.
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Ato be huge reservoirs of energy, possibly causing sea floor instability, and
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Bto be huge reservoirs of energy, possibly causing sea floor instability, and even as
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Cas huge reservoirs of energy, possibly causing sea floor instability, and
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Das huge reservoirs of energy, and the possible cause of sea floor instability,
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Eas huge reservoirs of energy, as possible causes of sea floor instability, and even as
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正确答案: E