Definition: 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: Late pickup. Sentence 1: Ben stayed after school for an important event. Sentence 2: Once the event was finished, everyone went home. Sentence 3: Ben had to wait on campus since his mom is picking him up. Sentence 4: She told him that she would be there soon. Choices: a. She ended up coming 1-2 hours later. b. He bought weed killer and took them out.
Output:
a