B. "Oh, we'll just return him home and apologize. Maybe they'll ask us to stay for dinner."
Explanation:
Answer B is the only one that could be correct, for two reasons. First, this is the only option that directly addresses the fact that this is a botched kidnapping. The sentence states the possibility of "returning him," and we can assume that this is a reference to the kidnapped person. The second reason is that this is the only option that describes the situation in a sarcastic way in order to highlight the absurdity of the situation.