Detailed Instructions: 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.
Q: Title: Fly Robin Fly. Sentence 1: Doug was in horrible marriage to Robyn. Sentence 2: Doug filed for divorce because he was unhappy. Sentence 3: Robyn started dating a new man. Sentence 4: Doug got the divorce and went out to celebrate. Choices: a. Doug is now with Nelson because they killed Robyn. b. Robyn went out with her new boyfriend and he murdered her.
A:
b