Correct Answer: To accept whatever results, good or bad

Solution : The fourth option is the correct choice.

The most appropriate meaning of the idiom, for better or (for) worse, is to accept whatever results, good or bad. This idiom is often used in the context of marriage vows, indicating a commitment to stand by each other through both favourable and unfavourable circumstances.

It expresses a willingness to accept and support someone regardless of the challenges or difficulties that may arise.

Therefore, the correct answer is, to accept whatever results, good or bad.