Which of the Following Is NOT an Advantage of Using

Which of the following is NOT an advantage of using open-ended questions in qualitative research?

A) They allow for freedom of expression on the part of the subject.
B) Open-ended questions are more reliable than, for example, forced choice questionnaires.
C) Asking open-ended questions may be the only way to capture the true feelings of subjects.
D) If the experimenter has left out an important concept in the study design, open-ended questions allow subjects to introduce it.