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Paleontologists disagree over whether the Chixculub asteroid event or the Deccan Traps volcanic activity was the primary source of the environmental changes that led to the extinction of the dinosaurs 66 million years ago. Recently, a team of researchers has concluded that only volcanic activity could cause those changes. To prove this, study leads Alexander Cox and Benhin Keller developed a computer model that simulated over 300,000 possible scenarios using data from the fossil record to determine which gases were present in the environment 66 million years ago. Their model showed that large amounts of carbon dioxide and sulfur were present in the atmosphere at the time of extinction. Which finding, if true, would most directly support Cox and Keller’s conclusion?Both the Chixculub asteroid event and the Deccan Traps volcanic activity have been known to have had a significant impact on gasses present in the atmosphere.eliminateThe existing data from the fossil record is limited and may not capture the full scale of the environmental changes that could lead to an extinction event.eliminateThe amount of carbon dioxide and sulfur in the atmosphere 66 million years ago is consistent with the emissions released by the Deccan Traps.eliminateThe computer model showed a sharp decrease in the amount of organic carbon (or plant and animal matter) at the time of the Chixculub asteroid impact.

Question

Paleontologists disagree over whether the Chixculub asteroid event or the Deccan Traps volcanic activity was the primary source of the environmental changes that led to the extinction of the dinosaurs 66 million years ago. Recently, a team of researchers has concluded that only volcanic activity could cause those changes. To prove this, study leads Alexander Cox and Benhin Keller developed a computer model that simulated over 300,000 possible scenarios using data from the fossil record to determine which gases were present in the environment 66 million years ago. Their model showed that large amounts of carbon dioxide and sulfur were present in the atmosphere at the time of extinction. Which finding, if true, would most directly support Cox and Keller’s conclusion?Both the Chixculub asteroid event and the Deccan Traps volcanic activity have been known to have had a significant impact on gasses present in the atmosphere.eliminateThe existing data from the fossil record is limited and may not capture the full scale of the environmental changes that could lead to an extinction event.eliminateThe amount of carbon dioxide and sulfur in the atmosphere 66 million years ago is consistent with the emissions released by the Deccan Traps.eliminateThe computer model showed a sharp decrease in the amount of organic carbon (or plant and animal matter) at the time of the Chixculub asteroid impact.

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Solution

The finding that would most directly support Cox and Keller’s conclusion is: "The amount of carbon dioxide and sulfur in the atmosphere 66 million years ago is consistent with the emissions released by the Deccan Traps." This is because their model showed that large amounts of carbon dioxide and sulfur were present in the atmosphere at the time of extinction, and if these gases are consistent with the emissions released by the Deccan Traps, it would support their conclusion that volcanic activity was the primary source of the environmental changes that led to the extinction of the dinosaurs.

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