The theme is the writer's view of or comment about the subject. The answer to your question is D. I hope this is the answer that you are looking for and it comes to your help.
        
                    
             
        
        
        
Yes. No cancer and heart disease would save millions of lives.
        
                    
             
        
        
        
Plant cell. it an keep its shape beacuse it has a cell wall. it might have chlorophyll in it which allows photosynthesis
        
             
        
        
        
The answer is A) a patient that can receive o- o+ b- and b+ is b+
        
             
        
        
        
The two substances that scientists use are 
carbon-14 and carbon-12