问答题

It can be inferred from the third paragraph that______.
A.four-fifths of conduct disorder is caused by nurture
B.one-fifth of conduct disorder is caused by nurture
C.one-fifth of conduct disorder is caused by nature
D.four-fifths of conduct disorder is caused by nature

A.
A.four-fifths
B.one-fifth
C.one-fifth
D.four-fifths
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