Final answer:
A specialized interview is a less structured interview technique that uses open-ended questions, allowing for a more free-flowing exchange of information. The correct answer is option a.
Step-by-step explanation:
The specialized interview tends to be based on a much less structured set of open-ended questions than other survey or interview techniques. In a specialized interview, the researcher engages in a one-on-one conversation with the subject, allowing for a more free-flowing and open exchange of information. Unlike closed-ended questions that offer predetermined choices, open-ended questions allow participants to respond as they wish, providing more subjective and varied answers.