Through photosynthesis, plants A convert starch to sugar
B convert radiant energy
to chemical energy
C turn water into fructose
D All of the above

I think its all of the above

Explanation:

photosynthesis is the process through which light energy is converted into either chemical energy or sugar. ... Some of the sugar is also stored for use later, by being converted into starch.

Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water.

At the end of photosynthesis, a plant ends up with glucose (C6H12O6), oxygen (O2) and water (H2O). ... They can even put the glucose into other sugars — such as fructose — to make a plant's fruit sweet. All of these molecules are carbohydrates — chemicals containing carbon, oxygen and hydrogen.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.