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: Out. Sentence 1: I opened the door to let the dog out. Sentence 2: I didn't look before she went into the yard. Sentence 3: A small kitten was standing beside the tree. Sentence 4: She ran straight for the kitten. Choices: a. The kitten hissed and ran for the fence. b. Then she remembered they taught her this rule and said "of course."
A:
a