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: Exchange student. Sentence 1: Allie decided to host a French student. Sentence 2: The French student came for a few months. Sentence 3: The girls became fast friends. Sentence 4: Allie then decided she wanted to go to France to study. Choices: a. Georgina was just happy to be even closer to meeting her baby. b. So when her friend went back to France, Allie joined her.
A:
b