High school dropouts earn an average of $9
问题：
High school dropouts earn an average of $9,000 less per year than graduates. Now a new study dispels a common belief why they quit. It’s much more basic than flunking out.
Society tends to think of high school dropouts as kids who just can’t cut it. They are lazy, and perhaps not too bright. So researchers were surprised when they asked more than 450 kids who quit school about why they left.
"The vast majority actually had passing grades and they were confident that they could have graduated from high school. " John Bridgeland, the executive researcher said. About 1million teens leave school each year. Only about half of African American and Hispanic student will receive a diploma, and actually all dropouts come to regret their decision. So, if failing grades don’t explain why these kids quit, what does Again, John Bridgeland: "The most dependable finding was that they were bored. " "They found classes uninteresting; they weren’t inspired or motivated. They didn’t see any direct connection between what they were learning in the classroom to their own lives, or to their career aspirations. "
The study found that most teens who do drop out wait until they turn sixteen, which happens to be the age at which most states allow students to quit. In the US, only one state, New Mexico, has a law requiring teenagers to stay in high school until they graduate. Only four states: California, Tennessee, Texas and Utah, plus the District of Columbia, require school attendance until age 18, no exceptions, another researcher, says raising the compulsory attendance age may be one way to keep more kids in school.
"As these dropouts look hack, they realize they’ve made a mistake. And anything that sort of gives these people an extra push to stick it out and it through to the end, is probably helpful measure. "
New Hampshire may be the next state to raise its school attendance age to 18. But critics say that forcing the students unwilling to continue their studies to stay in school misses the point—the need for reform. It’s been called for to reinvent high school education to make it more challenging and relevant, and to ensure that kids who do stick it out receive a diploma that actually means something.
The underlined words "stick it out" probably means "______".
A．complete schooling
B．solve the problem
C．love having classes
D．believe in themselves
2011年9月14日执法人员何军、关平对零售户张亮的“荣军商店”（持有烟草专卖零售许可证）依法进行了检查，当场查获了非法渠道购进的“芙蓉王”真品卷烟10条（进货总额2200元，后经调查该卷烟是某外地人在3月份给张亮送过来的），同时又发现了张亮的两张销售票据存根：2011年3月10日一次销售了硬“白沙”90条（100元/条），2011年8月25日一次销售了“红梅”70条（80元/条）。9月15日何军、关平向张亮送达了《行政处罚事先告知书》，次日送达了《听证告知书》；9月17日张亮提出听证要求，19日D县局通知张亮于25日到该局参加听证会。张亮因事不能参加，书面委托其父亲参加听证会。听证主持人何军认为张亮违法行为情节严重，应当接受教育，要求其必须亲自参加。张亮参加听证会后，D县局认定零售户张亮构成未在当地烟草专卖批发企业进货和无证批发烟草制品两种违法行为，并作出如下行政处罚决定：对于张亮未在当地烟草专卖批发企业进货的违法行为，处以220元罚款；对于无证批发烟草制品的违法行为，处以责令其停止经营烟草制品批发业务、没收违法所得、处以14600元罚款。对于张亮无证批发一案，D县局认为事情并非这么简单，背后可能存在涉烟非法经营网络，决定进一步进行深入调查，结果发现张亮的两个亲戚潘亿、游明有违法经营嫌疑。D县局立即布置稽查一中队、二中队根据线索分头开展案件经营。稽查一中队在C县局协助下经查阅档案发现：潘亿（身份证号351783198310240125）是C县局的重点监管对象，经营地址在C县城区中兴路30号，家住城区花园小区3幢101室。在掌握案情后，D县局将潘亿的违法线索移交给C县局。C县局决定联合公安部门对潘亿的住所进行检查，并制定了调查取证方案。9月27日，在其家中查获200条“玉溪”卷烟和一本账册。经鉴定，“玉溪”卷烟为假冒注册商标卷烟，货值4万元。经查实：潘亿于2010年1-2月期间大量收购真品“大丰收”卷烟销售到周边县，共计1400条（每条购进价18元，销售价20元）；2010年8-12月期间购入假冒“玉溪”卷烟1500条，已销售1300条，销售金额26万元。2011年10月5日，D县局稽查二中队在城郊“家家乐”农庄中查获假烟400条。经调查，卷烟货主游明（无烟草专卖许可证）为牟取暴利，于2011年3-5月组织生产假冒“中华”、“555”、“云烟”等各类品牌卷烟共计3000条。截止2011年10月1日，游明已经销售上述假烟2600条，销售金额20万元；其余尚未销售而被查获的假烟400条，经鉴定为假冒注册商标且伪劣卷烟，货值4万元。经调阅有关档案发现，2006年7月3日，游明因销售伪劣产品罪被判处有期徒刑三年，缓期五年执行。2011年10月10日，D县局执法人员在对游明一案进行审核时，发现涉嫌犯罪，立即于当日上午11点向局长韩兵提交了案件移送报告，韩兵立即批准决定向D县公安局移送该案。10月12日下午，执法人员到D县公安局办理了移送手续，并移送了涉嫌犯罪案件移送书、涉嫌犯罪案件情况的调查报告、涉案物品清单、有关检验报告以及涉案物品，D县公安局依法办理了接收手续。14日上午，D县公安局经初步审查，认为该案查获的假烟货值只有4万元，不构成犯罪，立即打电话告知D县局不予立案，并于17日出具并送达了不予立案通知书。D县局认为公安机关应当立案，遂于24日提请D县公安局复议，D县公安局复查后决定立案。经过进一步的调查取证，成功侦破了该起涉烟案件，游明得到了应有的法律制裁。请根据背景材料，回答下列问题：