Copyright was originally the grant of a temporary government-supported monopoly on copying a work. Its sole purpose was to encourage the circulation of ideas by giving authors the opportunity to derive a reasonable financial reward from their works. However, copyright sometimes goes beyond its original purpose since sometimes __. The conclusion of the argument is most strongly supported if which one of the following completes the passage? ['there is no practical way to enforce copyrights', "copyrights hold for many years after an author's death", 'authors are willing to circulate their works even without any financial reward', 'publication of copyrighted works is not the only way to circulate ideas']