阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
The Price of Success
One problem for schools is that many students do not want to study hard. As a result, they perform (表现) poorly in their classes. This is especially true in the United States, where average scores for math and science are lower than in many other countries. In recent years, schools and charities have been looking for ways to help students get better grades in these subjects. An organization called the LMD Foundation introduced a program called Learn and Earn recently.
In the program, money was used to get a group of students to study harder in math and science. In addition to the normal school day, they went to after-school classes for four hours each week. The students were paid eight dollars for each hour of after-school class. By the end of the year, the students in the program had higher grades than a similar group of students who had not taken part.
Not everyone thinks that this is a good idea, though. TV reporter John Tulenko studied data (数据) from a similar program. He found that students' grades went back down when they stopped getting paid. Many people are worried about this. They think that the students study because they want money, not because they enjoy learning. Also, some people believe that these types of programs are a bad idea because it is a large part of a teacher's job to get students to study. If students are given money, some teachers might stop trying to do this.
However, others believe that these learning programs can be helpful for students from poor families. Many of these students do part-time jobs after school, and some even quit school at a young age to work. Some do this to help get money for their families. Others feel that they can learn more by working than by going to school. Programs like Learn and Earn let these students stay in school and still make money.
