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: Swimming. Sentence 1: Andy liked to tease Bo about his fear of going in the water. Sentence 2: Bo was trying to impress Judy at the beach and Andy was chiding him. Sentence 3: So Bo decided to face his fear and decided to swim out to the atoll. Sentence 4: Judy and Andy watched as Bo slowly started to sink into the waves. Choices: a. Andy rushed to save Bo but it was too late and Bo was never seen again. b. They told me he was going to be ok, and I was relieved.
[A]: a

[Q]: Title: Riding Bikes with Music. Sentence 1: Lisa loved to ride her bike in the summer while listening to music. Sentence 2: One day she went out for a ride with her headphones in. Sentence 3: The sun was warm and the music sounded amazing. Sentence 4: The music was so good that she didn't hear the truck veering her way. Choices: a. She dodged the accident just in time. b. I wore underwear as a safety measure.
[A]: a

[Q]: Title: The Bet. Sentence 1: Barbara always she could to do anything a man could do. Sentence 2: Thomas bet that she couldn't change the oil in her car car. Sentence 3: Barbara bought everything she needed to change the oil. Sentence 4: Barbara couldn't break the bolt on the oil pan. Choices: a. Gabby joined the league the next day. b. Because he won, Thomas changed the oil for her.
[A]:
b