Answer: "He" is the person who succeeded despite the doubters.
The context seems to be a situation that seemed impossible to most people, but one person dared to try, even when someone scoffed and tried to discourage him. 
The alliteration is the repetition of s-sounds in "someone scoffed"
Explanation:
 
        
                    
             
        
        
        
I’m sorry I don’t understand the question. Can you clarify it?
        
             
        
        
        
no, this is because it can cause a lot of effects later on in their lives. 
 
        
             
        
        
        
Answer:
Either C or D. 
Explanation:
I limited it down for you. Im sry I couldn't do more. :/