Answer: A. The inner layer of the chloroplast membrane is labeled
Step-by-step explanation:
Usually in plants, carbon dioxide enters the interior part of leaf through the pores also known as stomata and then diffuses into the stroma of the chloroplast.
Unlike the reactions to light, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma, also called the internal space of the chloroplasts, so it also takes place in the coroplast's storma.