Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.
Problem:(CNN) -- The age rating for new mobile video-sharing app Vine has been raised to 17+, meaning appropriate for users 17 and older, after it was flooded with pornographic images. Since its launch two weeks ago, the Twitter-owned Vine had been rated 12+ in Apple's App Store, the only place it is currently available. But sexually explicit video clips almost immediately began appearing within the app, including one mistakenly showcased in its "Editor's Picks" section, drawing outrage from some users. The new rating, for such criteria as "frequent/intense sexual content or nudity," means users wishing to download Vine must click on a window promising that they are over 17. There is no age-verification system, however, and nothing to stop younger users from downloading the app.The age rating for new mobile video-sharing app Vine has been raised to 17+Sexually explicit video clips have been appearing within the appSince its launch two weeks ago, the Twitter-owned Vine app had been rated 12+ 
 Questions:The issue made headlines January 28 when Vine users noticed a video of what was described as hardcore pornography showcased in the prominent Editor's _ section of the mobile app. (A) CNN (B) Twitter (C) Vine (D) Apple (E) App Store (F) Editor's Picks
Solution:
(F)