Solution:Wimmer and Dominick describe the development of mass media research through four historical phases that show how academic attention shifted from the medium itself to its users, effects, and eventual improvement.The first phase, The Medium (A), focuses on identifying the nature, structure, and functioning of the new technology-how it works, who owns it, and what its characteristics are.
After establishing this baseline, research moves to Uses and Users of the Medium (D), where scholars analyze how audiences adopt the medium, why they use it, and what gratifications they seek, marking the rise of audience-centered research.
The third phase is Effects of the Medium (B), which investigates how exposure influences beliefs, attitudes, emotions, and behaviors, leading to major theories such as agenda-setting, cultivation, and social learning.
Finally comes How the Medium Can Be Improved (C), where research becomes applied and evaluative, offering suggestions for better content, ethical use, and social value.
This progression reflects the chronological evolution from understanding the medium → understanding
its users → understanding its impact → improving
its function.