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: Late Payment. Sentence 1: Tom's Netflix stopped working. Sentence 2: He checked and the internet was still working. Sentence 3: Tom decided to call up the free number. Sentence 4: They informed Tom that his latest payment didn't go through. Choices: a. He paid it again and it started working. b. After they got home, Lana mended her torn pants.
Output:
a