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: The Big Move. Sentence 1: Lana lived in a big city near her family and friends all of her life. Sentence 2: After a couple of years of retirement, she wanted to do something new. Sentence 3: She decided to move to a small coastal town in Florida. Sentence 4: She secured a furnished house by a lake, packed a bag, and moved. Choices: a. They walked into the class together and became best friends. b. She missed her family but was very happy for her new life.
b