In Their Field Experiment, Leyens Et Al

In their field experiment, Leyens et al. (1975) evaluated the impact of media exposure on the aggression of Belgian delinquents. In this study, the authors found that viewing violent films

A) resulted in a significant increase in physical and verbal aggression.
B) did not affect verbal and physical aggression.
C) increased verbal aggression but had no impact on physical aggression.
D) increased physical aggression but reduced verbal aggression.