【单选题】At the end of the nineteenth century, a rising interest in Native American customs and an increasing desire to understand Native American culture prompted ethnolo- gists to begin recording the life st...
A.
The historical backgrounds of two currently used research methods are chronicled.
B.
The validity of the data collected by using two different research methods is compared.
C.
The usefulness of a research method is questioned and then a new method is proposed.
D.
The use of a research method is described and the limitations of the results obtained are discussed.
E.
A research method is evaluated and the changes necessary for its adaptation to other subject areas are discussed.