请教LSAT-2-4-11

Lsat-2-4-11.Every week, the programming office at an FM radio station reviewed unsolicited letters from listeners who were expressing comments on the station’s programs. One week, the station received 50 letters with favorable comments about the station’s news reporting and music selection and 10 letters with unfavorable comments on the station’s new movie review segment of the evening program .Faced with this information, the programming director assumed that if some listeners did not like the movie review segment, there must be other listeners who did like it. Therefore , he decided to continue the movie review segment of the evening program.

Which one of the following identifies a problem with the programming direction’ s decision process?

(B) He couldn’t properly infer from the fact that some listeners did not like the movie review segment that some others did.

(c) He failed to take into consideration the discrepancy in numbers between favorable and unfavorable letters received.

答案是B,我选的是C.为什么啊?谢谢!!!!

the conclusion only refers to the listeners of movie segment, but the favorable and unfavorable letters refer to not only listeners of movie segment but also  of news reporting and music selection segment.