Which of the Following Is TRUE

Multiple Choice

Which of the following is TRUE?

A) Designing a questionnaire is often an iterative process,with steps or sequences of steps often being repeated.
B) It is difficult,if not impossible,to state a question in such a way that it will mean exactly the same thing to every respondent.
C) Gathering information by way of a questionnaire requires decisions with respect to structure and disguise and also whether it will be administered by mail,telephone,or personal interview.
D) Both a and b.
E) a,b,and c.