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: Water bill. Sentence 1: Sam needed to pay his water bill. Sentence 2: He looked at his bank account, but the balance was too low. Sentence 3: Sam remembered he had a piggy bank stored in his closet. Sentence 4: He opened the bank and found two hundred dollars! Choices: a. He straightened his bed just as the time expired. b. Sam was relieved that he would be able to pay the bill.
a