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: Better Grades. Sentence 1: The brothers took an acting class. Sentence 2: They worked on everything together. Sentence 3: They thought they would get the same grade. Sentence 4: One of the brothers got a better grade than the other. Choices: a. The one with the better grade teased his brother. b. Zach reminded him that it was birthday paper for Jesus.
a

Title: Koala. Sentence 1: Ky wanted a koala for a pet. Sentence 2: She begged her parents incessantly. Sentence 3: But they had to tell her that koalas made bad pets! Sentence 4: Ky was sad, but finally she understood. Choices: a. Soon she decided on a dog instead! b. Evan was fully dressed.
a

Title: Cereal. Sentence 1: Anna's son John always ate cereal for breakfast. Sentence 2: He never liked anything else. Sentence 3: But then one day they were out of cereal! Sentence 4: Anna made him toast and eggs instead. Choices: a. He ate it grudgingly, but still wished for cereal! b. Ten minutes later, he reeled in the biggest fish he'd ever seen.
a