The best choice would be C. She is arrogant. Her tone in which she speaks sounds snobby in a way. We can’t assume that she is dishonest she possibly is a genius. I don’t think she is nervous for she speaks very boldly. Her statements never showed in any way how genius she was. So yes C is the best choice.
        
                    
             
        
        
        
Probably B because if you use abbreviations you can type quicker but idk
 
        
                    
             
        
        
        
Answer:
"Elasticity is involved whenever atoms vibrate. An example is the movement of sound waves."
Explanation: 
Hope this helped :)
 
        
             
        
        
        
Personal letter
directions
poem
instruction sheet
mystery story