Which statement is completely true?

Postmodernists are concerned with balancing perceived opposites such as love and hate, and innocence and knowledge.

Romanticism is a literary movement modeled on the works of ancient Greece and Rome.

Our literary heritage has been shaped by a number of literary movements, which are characterized by shared assumptions, beliefs, and practices.

Playfulness with theme and form is characteristic of literature written by Naturalists.

Our literary heritage has been shaped by a number of literary movements, which are characterized by shared assumptions, beliefs, and practices.