A research method that observes the results of changing one or more marketing variables is called what?

• A. Experimental method
• B. E-tail
• C. Ethics
• D. Empowerment

Answer: (A)

Testing how changing marketing variables affects outcomes is done through the experimental method. This approach deliberately manipulates one or more variables—like price, advertising message, or product features—and then measures the resulting changes in outcomes such as sales, awareness, or preference. By controlling other factors and often using random assignment to treatment and control groups, you can attribute observed effects to the specific changes made, establishing cause-and-effect. That’s why this method is the best fit for studying the impact of marketing actions before rolling them out more broadly. The other terms don’t describe a research design: e-tail is online retail, ethics covers moral guidelines for research, and empowerment refers to giving people decision-making authority.