In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Title: Ebola. Sentence 1: T'Pol was an African tribal chief. Sentence 2: He went into his chambers to contact the spirits. Sentence 3: He asked them why his people were contracting Ebola. Sentence 4: Then T'Pol realized something. Choices: a. They just needed to bury their dead instead of touching them. b. Harold was very angry at the airline.
a