scientific tools used in experiments. publications for conducting research. scientific method to test hypotheses. locations for conducting their experiments.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: An astronomer and a marine biologist were having lunch and discussing their current experiments. They discovered that although they investigate different areas of science, they most likely use the same
Possibilities:
- scientific tools used in experiments.
- publications for conducting research.
- scientific method to test hypotheses.
- locations for conducting their experiments.

scientific method to test hypotheses.