When we breathe out, relaxation of the ribcage allows movement of carbon dioxide out of the lungs due to?

Group of answer choices

Oxygen has left the lungs, thus creating space for carbon dioxide to move into the lungs

The creation of a higher pressure in the lungs, thus allowing carbon dioxide to move down its partial pressure gradient

Carbon dioxide movement does not rely on relaxation of the ribcage

The creation of a lower pressure within the lungs, thus allowing carbon dioxide to move down its partial pressure gradient Make sure your entire response is wrapped in JSON format.
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