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: Pierced. Sentence 1: Ana was celebrating her 18th birthday. Sentence 2: She went to get her ears pierced. Sentence 3: But then she decided to get her tongue done, too! Sentence 4: For good measure, she also had her left eyebrow pierced. Choices: a. He got the book when the price went down. b. Now Ana really felt like an adult!

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
b