The old-age dependency ratio _______________________

a. is not a problem for countries with low fertility rates
b. is lowest in Japan where individuals retire in their 70s
c. is not an immediate problem in the United States because its population is growing due to immigration
d. is highest in developing countries, particularly in Africa

Answer: C

Psychology

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In the educational teaching method ___________, children work together in groups to achieve a common goal

a. assisted discovery c. reciprocal teaching b. cooperative learning d. the zone of proximal development

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While middle childhood is a healthy period, more than ____________ of children are likely to have at least one serious medical condition over this time period

a. 10% c. 60% b. 30% d. 90%

Psychology