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: Math Quiz. Sentence 1: Tom was out all weekend partying. Sentence 2: He figured he didn't have much to do in class on Monday. Sentence 3: He was hungover for his first class. Sentence 4: It was math and his professor did a pop quiz. Choices: a. Tom did terrible on it. b. When the optometrist called, he rushed to pick up his new glasses.
a