"Cross-Checking" Is a Useful Method When Collecting Data About Secret

"Cross-checking" is a useful method when collecting data about secret or hidden forms of deviance such as drug dealing that involves

A) ascertaining the logical validity and coherence of all data collected through quality spot-checks.
B) checking the reliability of interview data collected to ensure all sociological conclusions are based on independent, verified sources.
C) checking that whether all data collected has been taped and properly stored.
D) applying a careful secondary analysis of all previous sociological research on the topic.