Which of the Following Statements Is True of Survey Instrument

Which of the following statements is true of survey instrument design?

A) It is unethical to use survey questions developed by other researchers.
B) Slight changes in question wording can produce great differences in responses.
C) The simple question "Why?" is usually the best way of finding out the reasons for people's behavior.
D) Survey researchers avoid trying to help respondents to remember because this invariably leads to memory distortion.