单选题 Most leading magazines would be given to consumers for free as long as______.

A、 they earned enough money to keep the business going.
B、 consumers take the trouble to read the ad in the magazine.
C、 consumers read the main content of these magazines.
D、 consumers understand the policy of the magazine business.

【正确答案】 B

【答案解析】[解析] 参阅第38题题解。