You will be given a definition of a task first, then some input of the task.
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.

Title: Reconsideration. Sentence 1: The professor gave everyone a final exam. Sentence 2: The next day, he expressed his frustration by yelling at the class. Sentence 3: He said that 95% of the class failed. Sentence 4: We tried to argue about how unfair the test is. Choices: a. She ended up feeling very comfortable! b. After several discussions, he decided to give test retakes.
Output:
b