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: Picking a Birthday Card. Sentence 1: Vanessa was shopping for birthday cards. Sentence 2: Nothing was quite right though. Sentence 3: She agonized over her choice, but nothing stood out. Sentence 4: Suddenly, she noticed a sparkly blue card tucked in a corner. Choices: a. Barb decided to run and grab a burger for lunch. b. She had found the perfect card for her sister!
A:
b