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: Love turns us into fools. Sentence 1: Dan's narcissist girlfriend only cared about what he had to offer her. Sentence 2: She wasn't in love with him like she said, but wasn't unfaithful. Sentence 3: She could be mean, though, and would tear him down at times. Sentence 4: Dan's friends tried to tell him that she as taking advantage of him. Choices: a. He decided not to be that kind of cool. b. He said he knew, and he loved her and didn't want her to leave.
a