SAT Text Structure and Purpose Question

Though John Crowley, author of Four Freedoms, is perhaps not as well known as the most widely read American writers of the past fifty years, influential figures have championed his work, including the poet James Merrill and the literary critic Harold Bloom. In his afterword to Crowley's book Little, Big, Bloom praises the novel's adroit blend of what playwright Friedrich Schiller termed the naive and sentimental modes — while Schiller thought works could be classified as either naive (seeking to describe reality) or sentimental (seeking to develop ideas), Little, Big demonstrates that a work can be both. Which choice best states the main purpose of the text?