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: All About a Boy. Sentence 1: Rachael and Kristy were best friends. Sentence 2: Rachael was dating a boy named Mark. Sentence 3: Mark broke up with Rachel for no reason. Sentence 4: The next week Mark and Kristy started dating. Choices: a. Impatient Agnes ended up waiting much longer than ten minutes. b. Rachael and Kristy are no longer best friends.
b

Title: Lila's New Friends. Sentence 1: Lila was sad because she had no friends. Sentence 2: She tried to make friends, but she was too shy. Sentence 3: One day at the park Lila saw some kids playing. Sentence 4: One of the kids saw Lila looking at them and asked her to play too. Choices: a. Now Lila goes to the park every weekend to play with her new friends. b. She was too embarrassed to tell Jan she didn't have much money.
a

Title: Broken Dreams. Sentence 1: Tim wanted to run in a marathon. Sentence 2: He practised everyday after school. Sentence 3: He got a lot better. Sentence 4: He broke his leg the day before the race. Choices: a. The dentist is very kind and treats her toothache. b. He felt sad that he couldn't run.
b