Final answer:
Despite efforts to celebrate, the woman, Bernice, experiences loss or disappointment as suggested by the somber mood while she reflects on the evening.
Step-by-step explanation:
In the situation described, despite the woman's earlier efforts, the unfortunate event that occurs is A. She loses the bet she celebrated. From the context provided, there seems to be a moment of reflection or possible disappointment as the character, Bernice, combs her short hair in the mirror. The specific details of the bet are not provided in the excerpt, but the emotive language suggests a somber mood after the celebration, indicating a loss or a realization of some misfortune.