In the cycling of energy and carbon through living things, plants and some other organisms use CO2 to make carbon-containing molecules, while other organisms break down those molecules and release CO2. During this process, CO2 is produced during ________ and used during ________.
A) cellular respiration; photosynthesis B) cellular respiration; photosynthesis and cellular respiration C) photosynthesis; cellular respiration D) photosynthesis; photosynthesis E) cellular respiration; cellular respiration