Which is the best explanation for the use of propaganda in public health campaigns?

During the second half of the twentieth Century, Public Relations have become a professional activity whose history, at least with regard to the Anglo-Saxon world, has been, in essence, well reported by authors like Scott Cutlip (1999) and Jacquie L' Etang (2004). Still little known or available only in fragments, in contrast, is the history of the political reactions to its appearance and intervention in society (see although ST. JOHN III, 2010). The criticisms and objections to the practice of Public Relations are ancient and originate from various fields of social life. Despite this, they do not attracted enough attention from researchers of this area in itself (exception is Moloney, 2006) or, when it happened, the study was limited to a structural approach (as we may see with the pioneering work of PERUZZO, 1982).

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i cannot see any of the options