Explanation:
1=too 2=enough 3=enough 4=too 5=too
hope this helps you 
 
        
                    
             
        
        
        
The answer is B. "He asked himself where it had come from and how; the past provided no explanation, and the future could not justify it."
This option is not a dark humor because it does not show the opposite side of happiness. The other choices explain that although there is happiness, he considered it as a burden- making it a dark humor. 
 
        
                    
             
        
        
        
I believe the answer is es.