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: 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.
[EX A]: b

[EX Q]: Title: Balloons. Sentence 1: Carl was an old man who sold balloons. Sentence 2: One day, he met a young boy named Russell. Sentence 3: Russell wanted a balloon but couldn't afford one. Sentence 4: Carl was in a charitable mood. Choices: a. Bill then realized it was Saturday. b. He gave Russell two balloons for free.
[EX A]: b

[EX Q]: Title: Unforgivable. Sentence 1: Guillermo really needed money. Sentence 2: He obtained a knife. Sentence 3: He then threatened a man for his money. Sentence 4: The man complied fearing for his life. Choices: a. And Guillermo got a lot of money for it. b. Carl was extremely happy when the food arrived.
[EX A]:
a