Definition: In this task you're given a question and you have to paraphrase the question to create the output question while retaining the meaning of the original question.
Input: Why is "Best Regards" or "Kind Regards" considered to be bad English?

What is the difference between "Regards," "Best regards," "Sincerely," "Yours Faithfully," and all of the other formulations? Which one is the best to use in North America in an email conversation?