C because fish take many more years to fossilize due to being contained/living in water their bodies are harder to break down
        
             
        
        
        
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Moreover, a small amount of codeine is converted to morphine in the body. The precise mechanism of action of codeine is not known; however, like morphine, codeine binds to receptors in the brain (opioid receptors) that are important for transmitting the sensation of pain throughout the body and brain.
        
                    
             
        
        
        
I took the test the answer (for sure) is c: programmed cell death. Good Luck!