D)the improving living standards of the poor people
8.according to the US National Heart, Lung and Blood Institute, the reason why older mothers children tend to be obese remains not entirely clear
9.According to Michael Symonds, one factor contributing to the obesity epidemic is decrease of family size
10 when two heavy people get married, chances of their children getting fat increase, because obesity is party genetiz
1. C. New explanations for the obesity epidemic.
2. A. gained the least weight
3. B. it causes sleep loss
4. D. It contributes to our weight gain.
5. C. It suppresses their appetite.
6. D. Those who quit smoking.
7. B. the rising proportion of minorities in its population
8. unclear
9. family size
10. partly genetic
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