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.

[Q]: Title: Dance Class. Sentence 1: Natalie was going to her first dance class. Sentence 2: She had dreamed about this day for years! Sentence 3: Her teacher invited her to put on her ballet shoes. Sentence 4: Natalie couldn't wait to learn how to dance! Choices: a. She was going to work hard to do a great job in the recital. b. But her boss congratulated her as she had found the quips funny.
[A]: b

[Q]: Title: Missed Class. Sentence 1: One day, I was late for class. Sentence 2: I had forgotten the teacher said to meet in the library that day. Sentence 3: I went to class, and sat there for half an hour alone. Sentence 4: The teacher finally sent my best friend to find me. Choices: a. She said the teacher was laughing at me, so I was relieved. b. He got his ball and also managed to get a date with her.
[A]: b

[Q]: Title: Key. Sentence 1: Adam lost his key one the walk home from school. Sentence 2: He was unhappy with his carelessness. Sentence 3: But making the same walk the next day, he spotted it! Sentence 4: It was laying on the sidewalk in plain view! Choices: a. Adam was so glad he had found the key. b. The office apprehended the thief and returned the woman's purse.
[A]:
b