Q: 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: A Reason To Practice. Sentence 1: Kristi took on some private music students to make extra money. Sentence 2: She had one student who never practiced for his lesson. Sentence 3: Every week she tried to encourage him to want to practice. Sentence 4: Finally she had to tell his parents that lessons were not helping him. Choices: a. Finally she decided it was time to buy a new charger. b. When his parents threatened to stop lessons he started practicing.
A:
b