Given the task definition and input, reply with output. 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 Worst Season Ever. Sentence 1: After Charles registered for classes, he was charged thousands. Sentence 2: He missed the first three days of class dealing with financial aid. Sentence 3: His next problem was his Geology teacher kept failing him. Sentence 4: In November his car stalled and someone called the fire department. Choices: a. He found the best clothes there. b. He turned his experience into a novel called, The Worst Fall Ever!
a