Step 1: Conceptual Identification: The query seeks the author of the seminal work "Public Opinion," a cornerstone in media studies and political science that examines the formation and manipulation of public sentiment.
Step 2: Comprehensive Elaboration: Walter Lippmann authored "Public Opinion," released in 1922. Lippmann posits that the average individual cannot fully comprehend the intricate modern world. Consequently, they develop a simplified mental construct, a "pseudo-environment," heavily shaped by mass media. He introduced the concept of "stereotypes" and the "manufacture of consent," positing that public opinion can be controlled by an elite. The other individuals are noted for distinct achievements: James Curran is a contemporary media scholar, Orson Welles was a renowned filmmaker (creator of "Citizen Kane"), and Walter Benjamin was a philosopher and cultural critic. Walter Lippmann is the identified author.
Step 3: Conclusive Resolution: Documented historical and literary evidence confirms Walter Lippmann as the author of "Public Opinion." Option (D) represents the correct selection.