Which One of the Reasons Below Does NOT Explain Why

Multiple Choice

Which one of the reasons below does NOT explain why in-office interviews are more costly per respondent than those conducted for in-home interviews?

A) interviewers need specialized skills for handling gatekeepers
B) in-depth understanding of product features is required
C) use of technical jargon takes more training than for consumer products
D) business respondents charge more for interviews
E) ability to address technical questions from respondents by interviewers