LSAT23-2-11[求助]

midnight

Five thousand of the 50000 books published in country Z in 1991 were novels.Exactly 25 of the films releasesed in country Z in 1992 were based on books publisned in coutry Z in 1991.
Which one of the following,if assumed,would allow the conclusion above to be properly drawn?
A None of the scripts used in films in 1992 were written by professional novelists;
B None of   films released in 1992 were based on books other than novels.
C None of books...

答案为什么是B呀?题目不全吧?结论是什么?

midnight

我文的结论是什么,是因为题目中问Which one of the following,if assumed,would allow the conclusion above to be properly drawn?,但上文看不出来结论是什么呀?

mindfree

incomplete to me.