The answer would be C valleys formed by a glaciers.
        
             
        
        
        
It’s B I think bro. Use a different app this one sucks
        
                    
             
        
        
        
Answer
D 
Glycolysis is the process, which occurs in cytoplasm of cell. This is the process which involves the breakdown of glucose to pyruvate. Citric acid cycle and beta oxidation of fatty acids occurs in the mitochondrial matrix, electron transport chain and  oxidative phosphorylation occurs in the oxysomes. So, it is NOT a.
It has to be 2 and 3, which is D.
Explanation: