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.

[Q]: Title: The Tip. Sentence 1: Maxine worked the overnight shift at the diner. Sentence 2: An old man would always come in and sit in her section. Sentence 3: One day, she noticed he seemed down in the dumps. Sentence 4: She sat across from him and they talked for a while. Choices: a. She thanked everyone for checking the video out. b. He left her a ten dollar tip on a six dollar tab.
[A]: b

[Q]: Title: The Halloween Party. Sentence 1: Susan was invited to a Halloween party. Sentence 2: She planned her costume for weeks. Sentence 3: The day of the party, Susan donned her costume. Sentence 4: Everyone loved Susan's costume. Choices: a. Susan won first place in the costume contest. b. From then on Tom didn't stuff himself as much.
[A]: a

[Q]: Title: No internet. Sentence 1: Allie was working on her research paper. Sentence 2: She needed Internet. Sentence 3: All the sudden the Internet stopped working. Sentence 4: She freaked out. Choices: a. She couldn't finish her paper. b. Marge quickly apologized and retrieved her own cart.
[A]:
a