You will be given a definition of a task first, then some input of the task.
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: Without Warning. Sentence 1: The moderator decided she would punish the poster for the post. Sentence 2: She waited for weeks before she decided what the punishment would be. Sentence 3: During that time, she gave no indication of her anger over the post. Sentence 4: She waited until the poster was comfortable and posting often. Choices: a. Without warning, she banned the poster and his IP address. b. She decided she could not live with the memories and quit her job.
Output:
a