Q: 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: Engagement. Sentence 1: Josh and Liz had been dating for 4 months. Sentence 2: He was already convinced he would marry her. Sentence 3: He found the perfect ring and bought it. Sentence 4: One night he took her to dinner. Choices: a. While out he proposed and she said yes. b. He bought the oatmeal raisin cookies.
A:
b