Approximately 1% of the solar radiation that strikes a plant is converted into the chemical bond energy of sugars. Why is this amount so low? A) Approximately 99% of the solar radiation is converted to heat energy. B) Only 1% of the wavelengths of visible light are absorbed by photosynthetic pigments. C) Most solar energy strikes water and land surfaces. D) Approximately 99% of the solar radiation is reflected. E) Only the green wavelengths are absorbed by plants for photosynthesis.