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: The Date. Sentence 1: Carlos was at the aquarium with his girlfriend. Sentence 2: They were on a date. Sentence 3: They spent hours looking at all the different fish. Sentence 4: Then they had dinner at a nearby restaurant. Choices: a. His girlfriend was very happy and gave him a hug afterwards. b. The bubbled cascaded out of the tub and all over the floor.
A:
a