Which of the following is NOT ranked among the top four, according to the diagram

A．Over or under eating and bed wetting.
B．Moody outbursts and withdrawn behaviour.
C．Truancy and unwillingness to do homework.
D．Refusing to participate in extra-curricular activities.

A．a source of pollution.
B．an effect of industrialization.
C．an advantage of industrial society.
D．a deposition of fossil fuels.