单选题

　　[概括大意] It is often thought that science fiction is a fairly new development in literature， but its ancestors can be found in books written hundreds of years ago. These books were often concerned with the presentation of some form of ideal society， a theme which is still often found in modern stories.

　　The main idea of this paragraph is__________.

　　A、Science Fiction is a Fairly New Development in Literature

　　B、Origins of Science Fiction

　　C、The Theme of Science Fiction

　　D、Science Fiction Has a Short History