Given the task definition and input, reply with output. 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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Title: A Walk in the Park. Sentence 1: Lisa loves to go for long walks in the park. Sentence 2: She especially loves to walk during the spring months. Sentence 3: The park has beautiful flowers that bloom during the spring. Sentence 4: Lisa often stops to smell the beautiful flowers along the trail. Choices: a. The park is one of Lisa's favorite places to walk. b. After the visit she began to give less treats and walk the dog daily.
b