Q: 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.
Title: A Ballet Accident. Sentence 1: Lisa was a ballet dancer. Sentence 2: She was rehearsing in a ballet room. Sentence 3: Suddenly, she tripped and fell down. Sentence 4: Her ankle was in pain. Choices: a. They had to take her to the hospital. b. Jake complained to the security office but they ignored him.
A:
a