地基加固处理的方法中，( )适用于处理松砂、粉土、杂填土及湿陷性黄土。

A．置换及拌人

B．加筋

C．振密挤密

D．排水固结

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.