Respuesta :
The characteristics that the study have in order for its results to be considered valid are:
- Empirical observations
- Outcomes that don't change with new experimentation.
Since Isabel is carrying out research and found an environmental study on the relationship between deforestation and local weather, it's important that the material should be valid in order to be accepted.
Therefore, to be valid, it should have the feature of an empirical observations and the outcomes should not change with new experimentation.
Empirical observations simply means the observations that are derived from experiments or based on experience.
In conclusion, the correct option is C.
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