Read the information about celebrities and choose the correct forms of adjectives.

Choose the correct option.

Kanye West is as [successful|the most successful] as Eminem.
Ashton Kutcher is one of [the most intelligent|the more intelligent] celebrities. He studied at the University of Iowa.
Kate Beckinsale is as [smart|smartest] as Ashton Kutcher.
Quentin Tarantino is one of [greater|the greatest] American film directors.