The correct answer is: It gives an intimate view inside the main character
The main character's point of view and the way he is said to relate to what is around him, through his preferences, his perceptions, his senses, bring to the story a more intimate view of this character. Excerpts like "I never seem able to" or "my ability" show strengths and weaknesses of the character. His strength was to be a good listener, his weakness would perhaps be his shyness or sense of inability to comment.
Not only is beautiful a more accurate synonym for pretty (sassy refers more to an upbeat, often sarcastic personality), but it also has a more positive connotation. Remember that synonyms are two words with very similar meanings.
Answer is A) beautiful.
