I you face this situation (someone answer your question via comment), ask that commentator to convert his/her comment to answer so that you can accept it.

If he/she does not reply you or does not make an answer, you can make an answer with linking that comment and make that answer CW because it is not only your effort.

Instead of making a feature for that we can do it manually.

If you face this situation (someone answer your question via comment), ask that commentator to convert his/her comment into an answer so that you can accept it.

If he/she does not reply you or does not make an answer, you can make an answer with linking that comment and make that answer CW because it is not only your effort.