A．Punishing students who damage school property.
B．Rewarding schools that have decreased the destruction.
C．Promoting teachers who can prevent the destruction.
D．Cutting the budget for repairs and replacements.

A．Tiredness.
B．Shallow breaths.
C．Obesity.
D．Snoring.

A．Men with sleep apnea seldom showed brain problems.
B．Women with sleep apnea were more likely to become depressed.
C．Most cases of sleep apnea had been diagnosed officially.
D．People with sleep apnea would become depressed sooner or later.