In What Context Did the Textbook Use the Analogies of the "Conga

In what context did the textbook use the analogies of the "conga line" and "square dance"?

A) to describe the two ways in which public relations is used in dance instruction
B) to help explain the difference between advertising and public relations
C) to describe the history of public relations and how it evolved over the years
D) to explain the difference between linear and dynamic models of public relations