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: The saved puppy. Sentence 1: Dina found a small dog who was hurt. Sentence 2: His friend told him to just leave him. Sentence 3: But Dina went for the dog. Sentence 4: She nursed him back to health. Choices: a. They charged him one hundred dollars for the crate. b. And now they are friends.
A:
b