I first saw John Singleton 's Higher Learning when I was 17 . Back in 1995 , my friend and I left the theater feeling like we had seen an important commentary on American society . We felt informed . It just goes to show you how clueless teenagers are .
According to the above context, choose the best option to answer the following question.
Question: what may be the reason why teenagers are so clueless ?
Options:
- Because they do n't think they know everything .
 - Because their brains shrink when they are teenagers .
 - Because the drugs mess with the mind .
 - Because they think they already have   everything figured out .


Because they think they already have   everything figured out .