I’m sorry I don’t really understand what you are asking for, but for the part there written in red I could help you answer that, but could you please maybe leave a comment and tell me what the other options isn’t he drop down menu are, and then I would be happy to help.
Answer:
The answer is the first one.
The best option would be, In my opinion, option c) which states that they and their spouses can all become friends and joke that their children cannot date each other.
If they have agreed that they and their spouses can be friends , then it means that they have forgiven each other and themselves. As for the second part, the most important term here is ‘jokingly’, which means that they did not mean it to be an iron-clad rule and it may change in the future.