Although Wales has been united with England for more than 400 ye

Although Wales has been united with England for more than 400 years，the Welsh has kept alive ____.
A、their own language
B、their own literature
C、their own tradition
D、All of the above
【正确答案】：D
【题目解析】：尽管威尔士与英格兰已经统一了400多年，但威尔士人保留了自己的语言、文学和传统。