No inorganic fertilizers on earth contain cycle participating carbon. The only carbon containing fertilizer is organic Urea (NH2CONH2). This is because plants are never deficient in organic carbon availability. The inorganic fertilizers only deal with their mineral need and that;s why they don't participate in carbon cycle.
I believe that C is the correct answer because Photosynthesizing animals are autotrophs and they can photosynthesize on their own which would make all of the other answers untrue
