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.

[Q]: Title: Broken Wings. Sentence 1: Nick tried to be careful as he dismantled his weather station. Sentence 2: He still ended up breaking one of the fragile wind sensor's wings. Sentence 3: He packed it in a box carefully to prevent more damage. Sentence 4: When he got to his new house, he went to assemble it. Choices: a. I talked my mother into buying me one shaped like a boot. b. Nick superglued the wing back and thought it was as good as new.
[A]: b

[Q]: Title: The Zoo Trip. Sentence 1: The kids were excited. Sentence 2: They were going to visit the zoo! Sentence 3: They walked around to eat exhibit. Sentence 4: They saw tigers and lions. Choices: a. It had been a really fun time at the zoo. b. Sally had failed to buy any additional stock, and was disappointed.
[A]: a

[Q]: Title: Bad Knee. Sentence 1: I was playing football with friends. Sentence 2: I twisted my knee. Sentence 3: I thought it would never go back to normal. Sentence 4: I decided to try physical therapy. Choices: a. After A month I could play like normal. b. Carla is proud to have a baby boy.
[A]:
a