What Is Meant by "Every Research Question in Criminology Should

What is meant by "every research question in criminology should be grounded in the existing empirical literature?"

A) the questions must be built on a constantly shifting body of literature
B) the research must be informed by what others before us have done on the topic
C) it cannot rely on a substantial body of contradictory theories
D) theory cannot be a rich source of research questions therefore we must rely on what others have found