In the Context of Marketing Research, Curbstoning Occurs When

In the context of marketing research, curbstoning occurs when:

A) a researcher does not maintain respondent confidentiality.
B) a researcher deanonymizes information on the Internet by combining different publicly available records available at social networks.
C) a researcher's trained interviewers or observers make up observed respondents' behaviors.
D) a researcher fully explains to respondents any deception that was used during research.
E) e-tailers display ads at one website based on a user's previous surfing behavior.