Final answer:
Without specific information about Nancy Scheper-Hughes's role in Alto do Cruzeiro, it is not possible to accurately determine whether she acted in one of the roles provided (Doctors Without Borders Volunteer, Peace Corps Volunteer, Physician's Assistant, Social Science Research Assistant).
Step-by-step explanation:
The student has inquired about the role of Nancy Scheper-Hughes when she first arrived in Alto do Cruzeiro. Based on the information given, which does not mention Nancy Scheper-Hughes specifically, it is not possible to provide a definitive answer to the options given: A)Doctors Without Borders Volunteer, B)Peace Corps Volunteer, C)Physician's Assistant, or D)Social Science Research Assistant.
However, it is known that Nancy Scheper-Hughes is a notable figure in the field of medical anthropology. If we refer to the information provided about Angela Garcia, who is mentioned in a related context and also has a focus on medical anthropology, it could indicate that Nancy Scheper-Hughes’s involvement in Alto do Cruzeiro may have been aligned with ethnographic and anthropological research, similar to Garcia's work. However, without specific information about Scheper-Hughes's role, an accurate answer cannot be provided.