Final answer:
The speaker assumes that the audience is not composed only of professional anthropologists, suggesting a mix of attendees with varying insights into folklore and anthropological practices.
Step-by-step explanation:
The question surrounding the speaker's assumptions about her audience's interests is best addressed by considering the context of anthropological expertise and interest in folklore and folk cultures. Within the various references given, it is clear that scholarly work in anthropology has historically involved a significant focus on the cultural aspects and traditions that may not always appear directly relevant to contemporary issues but nonetheless add rich layers to our understanding of human societies. Scholars and academics in the field often assume a certain level of interest and knowledge among their audience, possibly excluding those not well-versed in the discipline.
Given the information provided, the speaker seems to assume that the audience is not exclusively composed of professional anthropologists, indicating that the audience might be a mix of individuals with varying levels of familiarity with folklore and anthropological methodologies. They may share an interest in Southern traditions, but the details do not imply they are fascinated or obsessed with them. There is also no indication that the audience disregards factual information or scientific methodology, nor that it consists only of professional anthropologists.
Thus, considering the examples and information provided in the references, the best supported answer to the student's query is E. not composed only of professional anthropologists.