Anyone in a course can answer questions that are posted in the course discussions. To respond to a question that has been asked by someone else in the course, add a response with your answer to the question post.
If you have received a helpful or correct response to a question that you yourself have asked, you can also mark the response as the correct answer. To do this, move your cursor over the check mark icon for the response, and then select Mark as Answer.
Note: The discussion moderation team can mark any response as correct. Learners can only mark responses as correct for their own posts.