According to official government records, in Greenland the suicide rate (suicides per 1,000 people) was seventeen times greater in 1987 than in 1960. Because Greenland changed from a hunting and fishing society to an industrial society between 1960 and 1987, the dramatic increase in suicide must be a result of this societal change.
Which of the following, if true, casts the most serious doubt on the conclusion drawn above
A．The change from a hunting and fishing society to an industrial society sometimes causes a dramatic increase in a society’s crime rate.
B．Even in a hunting and fishing society, some proportion of the society’s members will choose to commit suicide.
C．According to official government records, most of those who committed suicide in Greenland in 1987 were male.
D．The life expectancy of Greenland’s inhabitants was not much greater in i987 than it was in 1960, before the societal change occurred.
E．(E) In 1987 most suicides that occurred in Greenland were reported as suicides to the appropriate government office, whereas in 1960 most were not.
