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.
Q: Title: Frank's Boat. Sentence 1: Frank lived alone on a houseboat for many years. Sentence 2: He loved to be free and out on the river. Sentence 3: Frank never thought of settling down in one place. Sentence 4: One day he met Sally, and all of that changed. Choices: a. Frank sold his boat and now has a family. b. She resolved not to let anyone else affect her self-esteem!
A:
a