C) a play in the form of a public service announcement is the correct option. Postmodernism is a cultural movement that mixes up old and new forms in art. This movement has reacted against the modern idea of art. The modern idea of art claims that true art is independent of the public context. Therefore, the modern critics will never consider that a pop song or a movie as true art. They will also think that a public service announcement is not art. Postmodern critics ,on the contrary, will consider a play ( a modern form of art) in the form of a public service announcement (a popular form of expression) art.