单选题 A group of tales in several languages concerning ______ and his knights developed into a literary tradition around a core of possible historical authenticity.
【正确答案】 B
【答案解析】解析：亚瑟王(King Arthur)是传说中英格兰的国王，圆桌骑士团的首领。他在罗马帝国瓦解之后，率领圆桌骑士团统一了不列颠群岛。关于亚瑟王的传奇故事源自何处，已无从查考，究竟他是不是以某位历史人物为基础而塑造出来的虚构角色也不得而知。