Which of the Following Is True of the Studies Done

Which of the following is true of the studies done by Bushman and Anderson (which evaluated exposure to violence and helping behavior) ?

A) it combined both laboratory and field research in a series of experiments
B) it was a series of experiments high in mundane realism but low in experimental realism
C) it combined both basic and applied research in a single experiment
D) it was a series of experiments high in experimental realism but low in mundane realism