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A. Troposphere B. Stratosphere C. Mesosphere D. Thermosphere. A: Troposphere is the atmospheric layer closest to the Earth's surface. Log in to see link for more information. Question|Asked by janiya. Asked 314 days ago|6/9/2016 2:02:09 PM. Updated 314 days ago|6/10/2016 2:53:26 AM.
The remaining 10 percent ozone is in the troposphere, a region that is between the Earth and the stratosphere. The different layers of the atmosphere are the troposphere, stratosphere, mesosphere and ionosphere. While the troposphere is the layer nearest to Earth, the ionosphere is the farthest away from it.