Which One Othe Following Is an Observation ThaSterk Makes in "Fieldwork

Which one othe following is an observation thaSterk makes in "Fieldwork on Prostitution in the Era oAIDS" abou"gatekeepers"? They

A) are not a vital part of fieldwork.
B) are important in gaining initial access to a scene.
C) may become more important to a study as time goes on.
D) tend to be individuals who exist on the periphery of a scene.