Answer:
The best time to revise a research question is during the editing and proofreading of the final draft.
Step-by-step explanation:
It's better to revise a research question during the editing and proofreading because there is a chance to change anything during editing. Editing means it's a last stage in any work or last but one stage.
So if we revise the research question during editing we will cover all mistakes. we may also revise a research question during proof reading also.