Which Statement About Media and Children Is True

Which statement about media and children is true?

A) Media violence has been found to have little impact on children's aggressive behaviour.
B) It is still unclear whether media violence has an impact on children's aggressive behaviour.
C) The evidence is clear that media violence has an immediate but not long-term effect on children's aggressive behaviour.
D) The evidence is clear that media violence has both an immediate effect and a long-term effect on children's aggressive behaviour.