Which of the following is true about the relationship between media violence and aggression?

A) Watching media violence definitely causes children to become more aggressive.
B) Watching media violence is positively correlated with aggression, but it is difficult to establish a cause-and-effect relationship.
C) Media violence and aggression are unrelated.
D) Having an aggressive temperament actually causes children to watch more violent media.

Answer: B
Rationale: Decades of research indicate that a positive correlation exists between exposure to violent media and aggressive behavior in individuals. However, the nature of this research makes it difficult to understand the cause-and-effect relationship between these two variables.