请教一道英语试题?contrast compare

请教一道英语试题?contrast compare
When it comes to schooling,the Herrera boys are no match for the Herrera girls.Last week,four years after she arrived from Honduras,Martha,20,graduated from Fairfax High School in Los Angeles.She managed decent grades while working 36 hours a week at a Kentucky Fried Chicken.Her sister,Marlin,22,attends a local community college and will soon be a certified nurse assistant.The brothers are a different story.Oscar,17,was expelled two years ago from Fairfax for carrying a knife and later dropped out of a different school.The youngest,Jonathan,15,is now in a juvenile boot camp after running into trouble with the law.The boys get sidetracked more, says the kids' mother,Suyapa Landaverde.The girls are more confident.
In the opening paragraph,the author introduces his topic by
[A]posing a contrast
[B]justifying an assumption
[C]making a comparison
[D]explaining a phenomenon
这是印建坤考研100片上的一篇,书上答案是C,

三楼的翻译是绝对错误的,是用的网上翻译工具把……这个题目很明显是做了一个对比,男孩子和女孩子的对比,并且各举了两个例子…………其实这类题目并没有怎么转弯,很明显的可以看出答案.如果LZ实在想不明白,可以试着查字典将整各文章翻译出来哦…………