b. Coker, Jeffrey W. Franklin D. Roosevelt: A Biography. Westport, CT: Greenwood Publishing Group, 2007.
Option B is the best choice. Citations always begin with the author's last name then the first name, if the author's name is available. Following the name should be the title of the work. Then the city of publication, publisher, and date of publication. Only the city of publication is actually required. So even in this correct answer, the abbreviation for CT is not needed. However, it's best to choose B instead of C because C does not include the city at all.