Answer:
B. Then, after we've stuffed ourselves
Step-by-step explanation:
Dependent clauses are those group of words that cannot stand on it's own, meaning they don't make complete sense. So, in order to be fully understood to make any meaningful sentence, they join anther group of words to be made whole. So, in the above passage, "Then, after we've stuffed ourselves" is the dependent clause as it can't or doesn't make any sense on it's own. Joining with other words, it only makes sense. All the other options can stand on their own, making perfect sentences.