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: Money isn't everything. Sentence 1: Jason had always wanted to be rich and happy. Sentence 2: He bought lottery tickets every week for years to try and get rich. Sentence 3: After 8 years, Jason won the jackpot with his numbers. Sentence 4: Jason won twenty million pounds. Choices: a. Rich made a mess. b. Although he was now rich, he didn't feel as happy as he hoped.
a