请问这篇英语阅读的第四题题为什么选A?

请问这篇英语阅读的第四题题为什么选A?
4、 A clever student usually likes _______.A.asking questionsB.answering questions C.findanswersD.teachingothers短文如下：Students learn their lessons in class．In class teachers teach them．Students sit in the classroom listening to the teacher．This is a way of learning．Is this the only way for students to learn something? Of course not．There is another way to learn．That is,students can teach themselves．For example,if you cannot remember something when you are doing your homework,you can look at your book to find the answer. This is a way to teach yourself．And it is not a difficult thing．We can do this at any place and at anytime．How do you teach yourself? The first thing you must do is reading．Read something you are interested in,or you have to read．The second is that you must ask yourself questions．The question is something you don’t understand,or you want to know more about it．You can write down these questions．A clever student is usually good at asking questions．The third is to answer the question yourself by thinking hard,by reading the text or other books,and sometimes by asking other people．This is the way of teaching yourself．And you must do this all by yourself．If you keep doing like this for a long time．you are sure to succeed in your study．