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: Scaffolding. Sentence 1: The painter climbed the scaffolding. Sentence 2: He started painting the side of the building. Sentence 3: The scaffolding felt wobbly. Sentence 4: The painter climbed down. Choices: a. He found that some of the joints were loose. b. Lee and his dog froze to death on a particularly cold night.
[A]: a

[Q]: Title: The Train is Cheaper. Sentence 1: Nigel was traveling to visit his aunt. Sentence 2: He was looking at flights but they were all too expensive. Sentence 3: Then he saw that train rides were much more affordable. Sentence 4: He bought his ticket and hoped for the best. Choices: a. For the rest of his life, Jim lied for his own benefit. b. Luckily the train ride was not too bad at all.
[A]: b

[Q]: Title: New radio program. Sentence 1: Lily thought the radio was not good. Sentence 2: She thought it was boring. Sentence 3: This is because of her generation. Sentence 4: Then she found some interesting programs. Choices: a. It changed her mindset. b. Teddy and his son bonded and had a great fishing trip.
[A]:
a