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: Frustration. Sentence 1: I sat in front of my computer and sighed heavily. Sentence 2: I couldn't find anything to do. Sentence 3: I stood up and walked to the bathroom. Sentence 4: I stared at myself in the mirror. Choices: a. I said aloud that I didn't know what I was going to do with my life. b. Sue made an A and was proud of herself.
Output:
a