when formulating a research question, a researcher should write a question that has already been thoroughly…

when formulating a research question, a researcher should write a question that has already been thoroughly covered. that is impossible to answer. that can be answered easily. that has an undetermined answer.
Answer
Brief Explanations:
A good research question should be open - ended and have an undetermined answer to drive new research. A question that has been thoroughly covered offers no new ground, an impossible - to - answer question is not practical, and an easily - answered question doesn't contribute much to knowledge expansion.
Answer:
that has an undetermined answer.