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: The Cat Chase. Sentence 1: Gale was walking her dog down the street. Sentence 2: There was a cat in the sidewalk. Sentence 3: Gale's dog saw the cat. Sentence 4: The dog got loose from Gale. Choices: a. Gale found the dog barking at the cat in a tree. b. Tom had barely missed it in his blind spot.
a