According to the professor, what is one advantage of a survey? A.It is the least expensive method of research. B.It does not have to be conducted face-to-facE. C.It provides more information than any other methoD. D.It is the most enjoyable method for the researcher.
A.It B. B.It C. C.It D. D.It E.
【参考答案】
B 解析：The professor says A survey can be highly structure......