Question

1/5

Answer 1

either B or D i think

Answer 2

@oliver69

Answer 3

Correct Answer: D
Explanations:
The experimental definition is the group in a clinical research study that receives the drug, vaccine, or other intervention being tested.
A descriptive definition is describing or classifying in an objective and nonjudgmental way.
The controlled definition is all extraneous variables are held constant so that they can't influence the results.
And the comparative definition is a method used to describe similarities and differences in variables in two or more groups in a natural setting.
So yes D.