In a Social Framework Testimony

In a social framework testimony

A) an expert witness is not asked about any specific facts during the trial, but gives the judge/jury general, background information
B) the expert witness is required to give a full, detailed report of the facts
C) jurors are given an overview of the societal influences that may have led to the criminal act
D) social scientists give testimony to enlighten legistive panels about the impact of research on social policy