research-based evidence supporting a scientific theory. a conclusion being tested by a hypothesis. random testing during an experiment. evidence for and against a scientific model.
I gave my students this multiple choice question: Gregor Mendel's observation of pea plants is an example of

Only one answer is correct among these 4 choices:
- research-based evidence supporting a scientific theory.
- a conclusion being tested by a hypothesis.
- random testing during an experiment.
- evidence for and against a scientific model.

Could you tell me which one is correct?

research-based evidence supporting a scientific theory.