Relationships among concepts are tested.
"Relationships among concepts are tested" would be the correct answer because this is the way theory is tested in quantitative research.
Quantitative research is research that is conducted using techniques that involves math, statistics, etc.
Quantitative research could be conducted using surveys, calculations, and etc.
In a quantitative research, researchers would conduct tests about relationships that have to do with a certain concept.
What that means is that they would get a specific concept and test to see if there is any particular relationships within the concept, in order to see the social impact on it.
Theories are what starts the quantitative research. Theories are made before the research is conducted to see if the results that they get match with the theory that they made. They would test the theory in the quantitative research in order to see if their theory is accurate.
