Answer:
The author's use of "No matter" implies his optimism involving the removal of the stain.
Explanation:
I don't have your passage, so I can't give you a full answer. However, the term "no matter" suggests that no matter what it takes, the stain will be removed.
Gradpoint answer
Your personality changes throughout grade school makes the most sense since an autobiography is about that person by that person and that's the most personal topic.
D. An unresolved conflict that makes the reader want to keep reading
