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: Scared. Sentence 1: Lupe, Christina and Carmen told stories about the haunted house. Sentence 2: But Carmen challenged the other two girls to go inside the house. Sentence 3: They climbed a brick fence and entered the backyard. Sentence 4: Next, they turned the handle to the back door. Choices: a. Years later these people brought their animals to the great vet Todd. b. Suddenly, a window opened and the girls ran for the wall.
a