Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
When it comes to public education in the United States, free markets and flee minds are mutually exclusive. Recent commercial ventures in the classroom demonstrate that when corporations attempt to cash in on the crisis in education, they are more interested in youth as passive consumers--to be marketed to the highest bidder-than as active thinkers. The most glaring of these ventures (企业) is Channel one, a commercial TV program which Whittle Communications broadcasts into almost 12,000 junior high and high schools across the country. For each thirty-second commercial on Channel One (the program contains two minutes of commercials per broadcast), Whittle garners (收取) ＄195,455 from advertisers including Burger King, Procter & Gamble, and Reebok.
This lesson in classroom commercialism defines democracy--not as civic responsibility or community involvement-- but as buyer's choice. Commercialism reduces education to a spectator event and students to a target audience. But students are defying marketers' vision of them as easy converts to brand loyalty. Youth are not just sitting back memorizing advertising jingles: increasingly, they are taking action against commercials in their schools.
Students at Coronado High School in Coronado, California, for instance, wrote an editorial in their school paper headlined "Channel One Invades Coronado high School" which asked: "Do you get the feeling that Big Brother will be watching？ I do.... We must investigate the makers of Channel one more before we put such a huge amount of trust in their hands.... Selling advertising mutes out of our school day exploits the entire educational process. It cheapens it. Education no longer becomes a learning process, it becomes a billboard."
Many young people, however, feel that the issue is more about freedom than it is the motives of corporations that exploit education for advertising purposes.
What is the main topic of this article？

A. Corporations attempt to cash in on the crisis in education.
B. Communications broadcasts into almost 12,000 junior high and high schools.
C. Education no longer becomes a learning process.
D. This article illustrates free markets and free minds are mutually exclusive.