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: Class Dismissed. Sentence 1: Jenny walked into her night class. Sentence 2: Her professor was going over a new lesson. Sentence 3: When he was presenting, the lights went out. Sentence 4: No one couldn't see since it was dark. Choices: a. It was time to explore! b. After 10 minutes, he dismissed the class.
Output:
b