A．The deciding factor in children’s academic performance．
B．The health problems of children raised by a single parent．
C．The relation between children’s self-control and their future success．
D．The reason why New Zealand children seem to have better self-control．
参考答案C
解析:听力原文：
From a very early age，some children exhibit better self-control than others．Now,[23] a new study that began with about 1,000 children in New Zealand has tracked how a child's low self-control can predict poor health,money troubles and even a criminal record m their adult years．
Researchers have been studying this group of children for decades now．Some of their early observations have to do with the level of self-control the youngsters displayed．Parents，teachers，even the kids themselves，scored the youngsters on measures like“acting before thinking”and“persistence in reaching goals．”
The children of the study are now adults in their 30s．Terrie Moffitt of Duke University and her research colleagues found that kids with self control issues tended to grow up to become adults with a far more troubling set of issues to deal with．
“The children who had the lowest self-control when they were age three to ten．1ater on had the most health problems in their 30s．and they had the worst financial situation．And they were more likely to have a criminal record and to be raising a child as a single parent on a very low income．”
Speaking from New Zealand via skype,Moffitt explained that self-control problems were widely observed，and weren’t just a feature of a small group of misbehaving kids．
“Even the children who had above—average self-control as pre-schoolers．could have benefited from more self-contr01 training．They could have improved their financial situation and their physical and mental health situation 30 years later．”
So,children with minor self-control problems were likely as adults to have minor health problems，and so on．
Moffitt said it’s still unclear why some children have better self-control than others，though she says other researchers had found that it’s mostly a learned behavior．with relatively 1ittle genetic influence．But good self-contr01 can be set to run in families in the children who have good self-control are more likely to grow up to be healthy and prosperous parents．
“Whereas some of the low．self-contr01 study members are more likely to be single parents with a very low income and the parent is in poor health and likely to be a heavy substance abuser．So mat’s not a good atmosphere for a child．So [24] it looks as though self-control is something that in one generation can disadvantage the next generation．”
[25] But the good news is that Moffitt says self-control can be taught by parents,and through school curricula that have been proved to be effective．
Terrie Moffitt’s paper on the link between childhood and self-control and adult status decades 1ater is published in the Proceedings of the National Academy of sciences．
【解析】C。讲座开头提到，一项最新研究选取了1 000名新西兰儿童，并追踪儿童的低自控力如何能预示出成年后的健康问题、金钱问题、甚至犯罪记录。C项是对讲座内容的归纳概括，故为答案。