Whenahoteloverbooksasell-outdate,itistakingtheriskthat（）

A.moreguestswillunder-staythanthenumberofroomsbywhichthehotelhasoverbooked

B.moreguestswillcancelthanthenumberofroomsbywhichthehotelhasoverbooked

C.moreguestswillno-showthanthenumberofroomsbywhichthehotelhasoverbooked

D.alloftheabove

正确答案：D