B (i'm actually not that sure though) because A is definitely wrong, C is not correct, and D is fine i think 
        
             
        
        
        
Yes because caffeine causes a chemical reaction <span />
        
                    
             
        
        
        
If you monitor your practice run you can see how much your improved time wise.
 
        
                    
             
        
        
        
Through healthy eating and exercise
        
                    
             
        
        
        
Answer:
how long you have left to live in appropriate life expectancy statistics?