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: Flap. Sentence 1: The flap hung down at an odd angle. Sentence 2: The seamstress bought new material to replace it. Sentence 3: She ripped off the old flap. Sentence 4: She sewed on the new piece she'd cut out. Choices: a. She smiled with satisfaction at the job well done. b. Jodie decided not to ski and used her afternoon to build a snowman.
a

Title: Chemistry. Sentence 1: My niece has two kids, 12 and 9. Sentence 2: They are both withdrawn and aloof. Sentence 3: Last weekend our two-year old granddaughter Sara visited from NY. Sentence 4: Sara loved the two kids and played with them. Choices: a. The teacher told her she is not ready for this difficult piece yet. b. They were very friendly to her as well, which was a surprise.
b

Title: Dirty Water. Sentence 1: Cindy barely drank any water. Sentence 2: She was always afraid it was contaminated. Sentence 3: During a hot day, she was too afraid to drink. Sentence 4: And she ended up in the hospital. Choices: a. But she was still too afraid to drink water. b. Erin decided she would avoid circuses and carnivals that used animals.
a