Answer:
it's D. I believe anyways is it if you can pick two pick A,D, or D and C who knows at this point 
sorry I'm not much help but I hope it did something 
 
        
                    
             
        
        
        
D)	Natural Gas i think is correct sorry if im wrong
 
        
             
        
        
        
Its the experiment part where you test the hypothesis
        
             
        
        
        
<span>Avery Identified through a qualitative test that DNA was present. Through a chemical test he found that the make up was DNA. Through enzyme testing Avery found that only DNA degradation stopped transforming.</span>
        
             
        
        
        
C) Producers convert light energy into chemical energy.