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: Tree. Sentence 1: Carl was tasked with finding his family's Christmas tree. Sentence 2: He was fifteen and he felt very manly and important. Sentence 3: But after a night of searching, no tree seemed perfect enough. Sentence 4: He went and bought an artificial tree at the store. Choices: a. Carl's family loved his fake tree just as much as any real tree! b. Glen decided she wasn't so bad afterall.
[A]: b

[Q]: Title: Piano Struggle. Sentence 1: Leo was trying to learn a piano piece he liked. Sentence 2: But it was too advanced for him. Sentence 3: Nevertheless, he practiced it everyday for weeks. Sentence 4: But when his piano teacher heard, he suggested practicing the basics. Choices: a. The other driver's insurance paid for the damage. b. After practicing easier pieces for months, everything became easier.
[A]: a

[Q]: Title: The Big Project. Sentence 1: Mrs Leach gave her class a big project to complete. Sentence 2: A lot of the students were struggling with this new project. Sentence 3: She decided if she would pair them together it would be easier. Sentence 4: The students enjoyed sharing ideas with each other. Choices: a. Everyone passed the project grade. b. She got an IV and felt much better.
[A]:
b