Instructions: 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.
Input: Title: The Filly. Sentence 1: Sam had owned the bay filly since she was born. Sentence 2: She was now a three year old and full of spirit. Sentence 3: Sam was going to saddle her for the first time today. Sentence 4: She was spooky at first but finally accepted the saddle. Choices: a. Kia decided the gift was wonderful after all! b. Sam got on and they went into the hills for their first ride.
Output:
b