C because cellular respiration uses combine oxygen and other toxic waste.
Well it deepends on how deep you are and what kinds of fossils you find. Like you would find fish, coral, sandallor fossils.
The correct answer is: It enters the citric acid cycle and associates with a 4-carbon molecule (OXALOACETATE), forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
The citric acid cycle is a cyclic process (part of the cellular respiration) where acetyl CoA is modified in the mitochondria to produce high-energy intermediate molecules for the oxidative phosphorilation (production of ATP).
