A、 It seriously impacts their physical and mental development.
B、 It has become a problem affecting global economic growth.
C、 It is a common problem found in underdeveloped countries.
D、 It is an issue often overlooked by parents in many countries.

【正确答案】 A

【答案解析】解析：由“Preventing hunger allows children to develop both physically and mentally．”可知营养不良对孩子的身心都有影响。所以答案为A)。

A、 They will live longer.
B、 They get better pay.
C、 They get along well with people.
D、 They develop much higher IQs.

【正确答案】 B

【答案解析】解析：由“And then at adulthood，IFPRI has actually demonstrated that children who were better nourished have higher wages，by a pretty large margin，by 46 percent．”可知早期营养良好的孩子成年后工资普遍高。所以答案为B)。

A、 Appropriated funds to promote research of nutrient-rich foods.
B、 Encouraged breastfeeding for the first six months of a child's life.
C、 Recruited volunteers to teach rural people about health and nutrition.
D、 Targeted hunger-relief programs at pregnant women and young children.

【正确答案】 C

【答案解析】解析：由“Ruel says in the 1980s Thailand was able to reduce child undernourishment by recruiting a large number of volunteers to travel the countryside teaching about health and nutrition．”可知泰国派志愿者去传授知识，所以答案为C)。