In "Many of these books and articles present the theoretical and empirical aspects of the interview as well as the training of the interviewers.", "empirical" here can be substituted by______.

A．The patient.
B．The physician.
C．The journalist.
D．The psychologist.

A．generalized principles for journalistic interviews are the chief concern for writers on journalism
B．importance should be attached to the systematic study of journalistic interviewing
C．concepts and contextual implications are of secondary importance to journalistic interviewing
D．personal experiences and general impressions should be excluded from journalistic interviews