Review the steps taken during the investigations. Change the hypothesis of the investigation. Research data on similar investigations. Conduct a different investigation.
I gave my students this multiple choice question: Students from two classes conducted the same investigation. Each class got different results. Which is the best way for the students to determine why the results were different?

Only one answer is correct among these 4 choices:
- Review the steps taken during the investigations.
- Change the hypothesis of the investigation.
- Research data on similar investigations.
- Conduct a different investigation.

Could you tell me which one is correct?

Review the steps taken during the investigations.