Which of the Following Statements Is True of Unstructured Questions

Which of the following statements is True of unstructured questions?

A) They are ambiguous questions that contain at least two negatives.
B) They are often skipped by the respondents unless the questions are interesting.
C) They are loaded questions that suggest a socially desirable answer or involve an emotionally charged issue.
D) They are questions with a predetermined list of responses available to aid or limit the respondent's answers.
E) They include two or more different attributes or issues but allow the respondents to comment on only a single issue.