Where’s the custom "trick-or-treating" derived from（）
A.It’s derived from the Irish Celts.
B.It’s derived from a ninth-century European custom.
C.It’s derived from the Catholic Church.
D.It’s derived from a ninth-century Roman custom.
正确答案：B
Where’s the custom "trick-or-treating" derived from（）
A.It’s derived from the Irish Celts.
B.It’s derived from a ninth-century European custom.
C.It’s derived from the Catholic Church.
D.It’s derived from a ninth-century Roman custom.
正确答案：B