The Validity of Anthropological Data Can Be Routinely Checked By

The validity of anthropological data can be routinely checked by:

A) never asking more than one person the same question.
B) asking a single individual the same question repeatedly over a period of time.
C) using photographs to document ethnographic reality and reveal inconsistencies in interviews.
D) asking another anthropologist to do a re-study of the field site.
E) comparing data collected with what has previously been published about the area or topic.