Answer:A and D
Explanation: Because that’s what US Test Prep said was right.
D bc the product u using was used b4 so if something is used b4 den u cnt use it again
Carbon atoms are converted into metabolites like acetic acid, lactic acid, aldehydes, etc via the action of different bacteria. In the process of fermentation or cellular respiration, carbon atoms are cleaved into three carbon molecule called pyruvate then eventually forming into metabolites.