During the process of photosynthesis, plants use carbon dioxide, water, and energy from the sun to produce glucose and oxygen. Which of the following correctly describes a structure that makes this process possible? A. The hollow and elongated xylem moves water upward from the root. B. The flat base of the stigma captures the suns energy at the most direct angle. C. The tall stalks of the seamen reach above the petals to bring oxygen into the flower. D. The leaf-like sepals release glucose to the atmosphere through their pores.