How do I *now* extend the expiration date on a Yahoo Answers question?

The ONLY time a question expires is if it has no answers. In that case it stays open for 7 days, and then will be deleted. There is no option to extend the time at that point. But even if there was, it would serve no purpose because the question would be so far down the list of open questions it wouldn't bee seen anyway. Which was the case even if extended after 4 days. If there's at least one answer, the question remains open does not expire. It remains open indefinitely, or until the asker chooses a best answer. Questions no longer go to voting.

If no one has answered your questions that will be deleted after 7 days. Or if your question has at least one answers so there is no time limit you can choose any lime a best answer after one hour your post. And can not delete a question it has answered as you can delete a question witin 4 days in past days also any Answers community can answer your questions after it begin reference/resolved . See latest change on source link.