Which of the following best reflects the definition of ethnography?
a. the study of ethnicity, race, and urban social relations in multicultural
b. questions that relate to the knowledge produced when sociologists link a current phenomenon to historical forces
c. the study of something with a historical basis (e.g., the Russian Revolution) and involving the analysis of documentary sources such as government statistics, newspapers, and so on, to explain a type of human behavior during a certain time in history
d. a way of studying people firsthand using participant observation or interviewing