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 seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

[EX Q]: Title: Bookshelf. Sentence 1: Spencer was moving. Sentence 2: He tried to lift the bookshelf. Sentence 3: The bookshelf fell down. Sentence 4: It broke all over. Choices: a. He walked back in because it was cold. b. Spencer bought a new one.
[EX A]: b

[EX Q]: Title: Instant Exit. Sentence 1: The official blew the whistle. Sentence 2: Everyone started to run across the track. Sentence 3: Brad was in the lead for several seconds. Sentence 4: Ben was able to catch up until he caught a leg cramp. Choices: a. The medics came onto the track to monitor him. b. Her hair was absolutely beautiful and perfect!
[EX A]: a

[EX Q]: Title: Punished for Accident. Sentence 1: Benny was making farting noises with his elbow. Sentence 2: He accidentally smacked a teacher who walked behind him. Sentence 3: She teacher fell sharply. Sentence 4: When I helped him up, he thanked me. Choices: a. Alex was reported to the authorities. b. On the other hand, he took Benny to the principal's office.
[EX A]:
b