Answer:
The correct answer is letter "B": Experimentation.
Explanation:
Experimental research is a study conducted based on trial and error in which the conclusions of the experiments become the hypothesis. The variables used in the study must have the ability to be manipulated, measured, and compared by the researcher. Experimental research aims to support or reject that the effect of something is the cause of another thing.
Thus, in the example, the experimental research is testing if using a Gold's Gym logo in an energy drink (cause) is cost-effective to be licensed (effect).