According to this paragraph, I would say that the tone is sad and informal. It could be considered sad because of her personal experience. How she also felt when her first boyfriend left her for another girl. 
Best wishes!
 
        
                    
             
        
        
        
Answer:
we can't answer if we don't have the sentences provided
Explanation:
 
        
             
        
        
        
I believe the answer is B
        
                    
             
        
        
        
Answer:
if i have started a work i need to finish it myself because we need to be self dependent