Peter's friend Paula tells him that she knows more about the trichromatic theory of colour vision than he does.She gives him four arguments supporting the trichromatic theory.Peter tells her that one of her arguments is wrong.Which of the following is NOT correct

A) The trichromatic theory explains the afterimage phenomenon very well.
B) The trichromatic theory accounts for colour blindness.
C) Colour TVs and screen monitors operate on principles of the trichromatic theory.
D) Trichromatic theory demonstrates that any colour is a mix of three primary colours.

Aggression in preschoolers is whereas by age 6 or 7, aggression becomes .

A) person-oriented; possession-oriented
B) mild; severe
C) instrumental; hostile
D) instigated; initiated