Correct answer: the hypothetico-deductive method.
Explanation: This model or method is a propose description of the scientific method. A researcher propose an hypothesis in a form that can be falsifiable. Then he/she must come up with tests for the observable data that he/she has. With this test the hypothesis can be proven true or false.
In summary, this method (The H-D method) is the procedure to build scientific theories. The results obtained come from direct observation or experimentation and will help to predict future effects that can be verified or proven by empirical evidence.