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: Flip. Sentence 1: Kaya rented the boat named for her, the kayak. Sentence 2: She thought she'd be a natural. Sentence 3: But she wasn't! Sentence 4: In ten minutes she had flipped the kayak. Choices: a. Rescue crews had to come help Kaya! b. He knew one day he would prove his brother wrong.
A:
a