I think it will be 
b)be multicellular
 Differentiation of cell is the process by which cell becomes spesialized in order to perform different functions))
 
        
             
        
        
        
It’s very confusing sorry for that
        
             
        
        
        
Answer:
Glycolysis
Explanation:
Glycolysis. Six-carbon glucose is converted into two pyruvates (three carbons each). ATP and NADH are made. These reactions take place in the cytosol.