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: Heavy Steps. Sentence 1: Lisa was listening to a CD in her apartment. Sentence 2: The people in the apartment above her were walking really hard. Sentence 3: The CD would skip at every step they took. Sentence 4: Lisa got tired of the banging steps. Choices: a. She failed the class. b. She called her landlord to complain.
a