Which of the following statements best describes the carbon atoms present in a seed-eating bird?
A) Inorganic carbon atoms in the seeds were incorporated into organic molecules by the bird.
B) The carbon atoms ultimately came from the soil.
C) The carbon atoms are ultimately derived from coal.
D) The carbon atoms ultimately came from carbon dioxide incorporated into sugars through photosynthesis.
E) The carbon atoms ultimately came from simple organic compounds that formed abiotically from inorganic carbon, hydrogen, oxygen, and nitrogen atoms.