What Statement Best Contrasts Differences Between Surveys and Interviewing

What statement best contrasts differences between surveys and interviewing?

A) Surveys are used for qualitative research and interviews are used for quantitative research.
B) Interviews have more closed-ended questions, surveys use more open-ended questions.
C) Interviews are more time-consuming and in-depth than surveys, which gather data quickly.
D) Surveys must be given by highly trained staff, interview questions can be read by anyone.