As Julie Lythcott-Haims mentioned, doing chores can help kids ( ).

参考解析：

根据人名定位至第二段According to Julie Lythcott-Haims...chores help a person develop a certain attitude... A项：变得更有能力和责任感，均属于下文对于该“态度”的详细阐述），定位至第六段As Julie Lythcott-Haims mentioned, we as parents should not put all the effort into our kids’ good grades and thick resume, B项：好分数和厚重的简历，排除）but rather on forming a certain set of habits, skills and a mindset in general, C项：培养“投入”心态，表述不准确）...This includes, for example, the ability to schedule a day, prioritize urgent and important tasks, and to not put things off. D项：弄清楚如何完成一系列任务，偷换概念）。故本题正确答案选A。