生产关系包括三个方面的具体内容，其中起决定作用的是( )。

A．产品如何分配
B．生产资料归谁所有
C．生产方式怎样
D．人们在社会生产中的地位和关系如何

FilmPro sells millions of videocassettes directly to consumers at $25 apiece for a $10 profit on each. However, FilmPro is losing money because people are buying illegally copied versions of its $25 videocassettes at far .cheaper prices. So far, one million illegally copied cassettes have been sold for $5 each. Illegal copying, therefore, has cost the company at least $10 million in potential profits.
Which of the following is an assumption that, if true, would allow the conclusion above to be properly drawn

A．The price of the illegally copied videocassettes never goes below $5 apiece.

B．At least one million more cassettes would have been purchased from FilmPro for $25 apiece if the illegally copied cassettes had not been available.

C．FilmPro refunds money to customers dissatisfied with the original cassettes.

D．The illegally copied tapes are of such high quality that it is virtually impossible to differentiate between them and the originals.

E．(E) FilmPro never sells discontinued videocassettes at less than $25 apiece.