perform the investigation in a different way change the hypothesis to match the results choose a different investigation repeat the investigation
I gave my students this multiple choice question: Michelle performed an investigation but the results did not match her hypothesis. What should Michelle do next?

Only one answer is correct among these 4 choices:
- perform the investigation in a different way
- change the hypothesis to match the results
- choose a different investigation
- repeat the investigation

Could you tell me which one is correct?

repeat the investigation