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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Title: The Bag Spill. Sentence 1: Colette was shopping one day. Sentence 2: She had a plastic water bottle tucked into her bag. Sentence 3: She sat the bag in her cart as she shopped. Sentence 4: When it was time to leave she realized the bag was soaking wet. Choices: a. Investigating she saw a big water spot from the bottle spilling. b. When his sister came home she found him dead from a heart-attack.
Output:
b