Use of a Signed Form Stating That a Member of the Community

Use of a signed form stating that a member of the community being studied consents to participate in the research follows from the ethical requirement that

A) ethnographers acquire consent in seeking the cooperation of scholars of the host country who have already studied the community being researched.
B) the researcher provide the American Anthropological Association with a consent document in case it needs to investigate allegations of the researcher's misconduct.
C) doing ethnography with some form of consent allows the researcher greater freedom in intruding on the relations that exist within the community.
D) the research not harm the people being studied.
E) the ethnographer never takes a stand on issues related to the community