You will be given a definition of a task first, then some input of the task.
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: A few drinks. Sentence 1: I had a few drinks with my boyfriend the other day. Sentence 2: We don't usually drink together. Sentence 3: We both had a few too many. Sentence 4: We laughed all night. Choices: a. It was a perfect night. b. It looked terrible on her skin tone.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
a