The "Chameleon Strategy" Used by Richard Leo in His Study

The "chameleon strategy" used by Richard Leo in his study of police interrogations refers to:

A) the strategy he used for deciding which police to observe.
B) how he presented a particular personality to the police to gain their cooperation.
C) the strategy he used for maintaining confidentiality.
D) how he convinced the sponsors of the research to provide funding for the research.