When Asking Respondents About Their Income, You Should

When asking respondents about their income, you should

A) offer narrow categories of alternatives, such as "$20,000 to $22,000" and "30,000 to $32,000."
B) request a specific figure, rounded to the nearest $100.
C) use interviewers who are trained in eliciting answers about sensitive topics.
D) position this question at the beginning of the questionnaire, to get it out of the way.
E) offer broad categories of alternatives, such as "Less than $20,000" and "30,000 to $40,000."