问题
is one of the famous tourism destinations, liesDonling, a group of the Qing Imperial Tombs
A:20 miles northwest of it
B:20 miles northwest of which
C:northwest 20 miles of it
D:northwest 20 miles of which
B:20 miles northwest of which
C:northwest 20 miles of it
D:northwest 20 miles of which
正确答案是：
