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: Teaching. Sentence 1: All her life Susan wanted to be a teacher. Sentence 2: She had just graduated college. Sentence 3: Susan had gotten a job at the local high school. Sentence 4: She began teaching. Choices: a. Susan loved her job teaching and did very well at it. b. It took the casino a while to calculate the winnings.
A:
a