The illustration below indicates that photosynthesis and cellular respiration are both complementary and balanced.An excess of sugars produced fossil fuels like coal and petroleum; this suggests that in the past,

A) the amount of photosynthesis occurring exceeded the amount of cellular respiration.
B) sugars were only one of several products of photosynthesis.
C) reduced carbon-rich molecules could be produced independently from the photosynthetic process.
D) the energy release from respiration must have exceeded energy use in photosynthesis.