Step 1: Recognize real advantages of unstructured questions.
- Useful for exploration when possible responses are unknown.
- Reduce bias by avoiding limiting answer choices.
- Good as initial, open-ended prompts to get rich responses.
Step 2: Identify the “not an advantage” option.
- (b) This is actually a disadvantage — articulate respondents dominate, leading to bias in qualitative data.
\[
\boxed{(b)}
\]