Final answer:
Willie's decision to apologize to his friend represents a direct result of an inner change in his character, reflecting personal growth and the importance of resolving conflicts.
Step-by-step explanation:
The event in the story that is a direct result of an inner change in Willie's character is when Willie decides to apologize to his friend after a disagreement (Option B). This choice reflects a personal transformation, indicating that Willie has come to realize the value of relationships and the importance of resolving conflicts. Unlike finding a hidden treasure or winning the lottery, which are external events, an apology requires a shift in personal perspective or values. Option B is aligned with the concept of the falling action in a narrative, where the character is altered by their experiences and demonstrates growth or change.