It can be inferred from the passage that the economic foundation of society is dependent on______.

A．To limit the water taken by children.
B．To wake up children for bathroom.
C．To make children take sleep-induction pills.
D．To make children stay up late into the night.

A．The working hurt are more concentrated in hazardous industries or occupations.
B．The working injuries are often connected with the gender.
C．Older workers are more likely to get hurt at work.
D．Over half of the injuries found at work have something to do with too long working hours.