im pretty sure the answer is C let me know if its wrong dont give me brainiest 
 
        
             
        
        
        
answer:
carbon dioxide !!
explanation:
hope this helps you !! 
if i'm wrong pls let me know lol !!
 
        
                    
             
        
        
        
It depends on where the fuel source is coming from and also how much fuel is there.