Instructions: 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: Egg problem. Sentence 1: Stephanie went to the grocery store to buy eggs. Sentence 2: When she got there, the whole dairy section was empty. Sentence 3: She drove to a new store and bought the eggs there instead. Sentence 4: But while she walked back home from her car, the eggs fell. Choices: a. She had to drive again to buy a new dozen eggs. b. When the grades were posted, she made a perfect score.
Output:
a