Study the following diagram and select the description that accurately describes the diagram: PI Bl 1111 R BOOK Pub Name Pub Mailing Addres Pub Phon Book Title Book Price he Pas Select one: 0 a. Publisher names can be stored even if they have not published a book yet O b. More than one publisher can co-publish each book O c. Each book must have at least one publisher o d. We can track information about a book without knowing the name of the publisher