Which of the following defines computer-assisted personal interviewing?
A. A type of survey that usually involves interviewing business people at their offices concerning industrial products or services
B. Use of a specially designed phone room to conduct telephone interviews
C. An interviewing method in which a mall interviewer intercepts and directs willing respondents to nearby computers where each respondent reads questions off a computer screen and directly keys his or her answers into the computer
D. An interviewing method in which the interviewer reads questions from a computer screen and enters the respondent's data directly into the computer