The overall chemical equation that describes photosynthesis is shown below. 6CO2 + 6H20 - C6H12O6 + 602 During photosynthesis, what best describes the role of the compound with the chemical formula C6H120$? A. a product that is not useful because of its low-energy chemical bonds B. a product that is useful because of its high-energy chemical bonds C. a reactant that is useful because of its high-energy chemical bonds D. either a product or a reactant, depending on whether the cell needs to store energy or release energy​