Review the steps taken during the investigations. Change the hypothesis of the investigation. Research data on similar investigations. Conduct a different investigation.
I am hesitating between 4 options to answer the following question, which option should I choose?
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?
Possibilities:
- Review the steps taken during the investigations.
- Change the hypothesis of the investigation.
- Research data on similar investigations.
- Conduct a different investigation.

Review the steps taken during the investigations.