The advantage of a personal interview is that it allows for more in-depth responses and detailed information, as open-ended questions can be utilized to gather rich qualitative data. This allows for clarification and follow-up questions, providing a deeper understanding of the interviewee's perspectives.
However, from your provided choices, none directly capture the advantage of personal interviews. Instead, they seem to refer to specific advantages of closed questioning methods in surveys. Could you clarify or provide additional context?