Final answer:
The detailed answer addresses the question about how b) Bobby discovers Nancy's murder, but clarifies that the provided context relates to a different story 'The Story of an Hour' by Kate Chopin, where Louise Mallard is informed of her husband Brently's death. The actual scenario given does not involve characters named Bobby and Nancy.
Step-by-step explanation:
The question regarding Bobby's discovery of Nancy's murder lacks context, making it challenging to determine the accurate scenario. However, based on the provided information about the 'railroad disaster' and the involvement of Brently Mallard's name, it appears to relate to a different narrative, specifically from the short story 'The Story of an Hour' by Kate Chopin. In this literary work, it is not Bobby but Louise Mallard who is informed about her husband's death in a train accident.
Richards, a friend of Brently's, was at the newspaper office when the news arrived and confirmed it with a second telegram before rushing to inform Louise with the assistance of her sister Josephine. Therefore, the details given do not align with the characters Bobby and Nancy but rather with Louise and her husband. In the case of Louise, the news was delivered by her sister, and her reaction was a mix of shock and a complex sense of freedom, which is not an option provided in the multiple-choice question. The answer is option b.