I am pretty sure the the answer is A
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 narrowed it down to B and D. Going to say D though